For a strong all-around choice, I’d start with the VEVOR 39-inch Trailer Tongue Box: its aluminum construction and locking lid suit buyers who want useful tongue-mounted storage without moving to a steel box. The Confote 39-inch Aluminum Toolbox is another roomy option, while the VEVOR Underbody Box fits shoppers who need storage below the trailer rather than on the tongue. The main tradeoffs are mounting location, available space, material, and weather protection; a box that fits one trailer may block access or exceed another’s clearance. Read on for all 14 options and guidance on matching a lockable box to your trailer and gear.
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Key Takeaways
- Tongue boxes dominate this lineup: the 39-inch aluminum models offer a practical balance of storage and a familiar mounting position, but buyers still need to check the trailer’s tongue dimensions and access to the coupler.
- Aluminum and steel serve different priorities: aluminum models emphasize lighter construction, while steel options such as the MaxxHaul and Garvee are alternatives for shoppers who favor a steel enclosure and can accommodate its weight.
- Underbody storage is a fit-first choice: the VEVOR 24-inch box and the 30-inch steel model use a different mounting position from tongue boxes, so ground clearance and frame space matter as much as listed dimensions.
- Compact boxes reduce fit conflicts: the 20-inch aluminum options and 26-inch steel tongue box suit tighter setups, though their smaller footprints limit what can be stored.
- Only one listing is a paired set: the two 18-inch underbody boxes can spread storage across locations, but each mounting point needs a suitable, secure fit.
| trailer storage boxes lockable | Material | Dimensions | Color | Lock |
|---|---|---|---|---|
| VEVOR Underbody Truck Box | Aluminum | 24 × 14 × 16 inches | Silver | Keyed T-handle |
| VEVOR Trailer Tongue Box | Aluminum | 39 × 16.5 × 12 inches | Black | Lock with two keys |
| Confote 39 Inch Heavy Duty Alu | Aluminum | 39 × 13 × 10 inches | Black | — |
| Black Aluminum-Coated RV Trail | Aluminum | 44 × 15 × 15 inches | Black | Keyed |
| 39 inch Trailer Tongue Box | Aluminum | 39 × 15 × 12 inches | Black | Keyed |
| 20 Inch Aluminum Flatbox Truck | Aluminum | 20 x 12 x 9.5 inches | Black | Included; two keys |
| Trailer Tongue Tool Box | Alloy steel | 26.6 x 13.6 x 11.9 inches | Black | Keyed |
| MaxxHaul 80349 Black Heavy-Dut | Alloy steel | 34.25 x 14 x 12.75 inches | Black | Keyed cam lock |
| 18 Inch Underbody Tool Boxes S | Alloy steel | — | Black | — |
| 30 Inch Steel Black Underbody | Alloy steel | 30 x 18 x 18 inches | Black | — |
| 20 Inch Aluminum Truck Bed Too | Aluminum | 20 × 12 × 9.5 inches | Black | Keyed lock; two keys |
| 26 Inch Aluminum Utility Trail | Aluminum | 26.4 × 13.5 × 12.5 inches | — | Keyed lock; two keys |
| VEVOR Heavy Duty Aluminum Truc | Aluminum alloy | 20 × 12 × 9.5 inches | Black | Keyed lock |
| Garvee Black Steel Truck Bed T | 12-gauge steel | 30 × 15.5 × 15.5 inches | Black | Not included; padlock required |
More Details on Our Top Picks
VEVOR Underbody Truck Box, 24″×14″×16″ Aluminum Storage Toolbox with Lock and Waterproof Seal
For buyers who need a lockable box beneath a vehicle rather than across the trailer tongue, this 24 × 14 × 16-inch underbody design offers a practical footprint and a keyed T-handle. Its waterproof seal and rust-resistant aluminum suit tools that stay on the trailer between jobs, while the 12.6-pound listed weight is easier to handle during installation than the larger VEVOR Trailer Tongue Box. The tradeoff is capacity: one compartment and fixed dimensions leave less room for bulky gear than that 39-inch model or the 44-inch Black Aluminum-Coated RV Trailer Toolbox. Measure the intended mounting area before buying, since fit depends on the vehicle and installation may require assembly. This is a focused choice for compact underbody storage, not a general-purpose high-volume chest.
Pros:- Compact dimensions suit underbody mounting where a long tongue box would not fit.
- Keyed T-handle provides lockable access.
- Waterproof seal helps protect contents from moisture.
- Rust-resistant aluminum keeps the box suited to outdoor vehicle use.
Cons:- Single compartment limits organization and storage of bulky equipment.
- Vehicle measurements are needed to confirm mounting fit.
- Installation may require assembly.
Best for: Trailer and truck owners with a measured underbody mounting space who want keyed, weather-protected storage for a smaller tool kit.
Not ideal for: Buyers storing long or bulky equipment, or anyone unable to confirm the 24 × 14 × 16-inch box will fit their mounting location.
- Material:Aluminum
- Dimensions:24 × 14 × 16 inches
- Weight:12.6 pounds
- Capacity:66 pounds
- Color:Silver
- Compartments:1
- Water resistance:Waterproof
- Lock:Keyed T-handle
Our verdict“Choose this VEVOR when compact underbody fit matters more than the greater storage area of the longer tongue boxes.”
VEVOR Trailer Tongue Box, Heavy Duty Aluminum Storage Organizer with Lock & Keys, 39″ x 16.5″ x 12″
The VEVOR Trailer Tongue Box is the more access-focused choice in this group: its gas strut-assisted lid is designed to make opening and closing easier than on the Confote 39 Inch Heavy Duty Aluminum Toolbox, which lists a conventional lockable latch. At 39 × 16.5 × 12 inches, it offers a broad single compartment for trailer gear, with a keyed lock and weather-resistant construction for equipment kept outdoors. Its black 5-bar tread finish also distinguishes it from the silver VEVOR Underbody Truck Box, which is smaller and intended for a different mounting position. The compromises are its single large compartment and 16.3-pound weight: it may be less convenient to handle during installation, and small items can be harder to keep sorted. Choose it for accessible tongue storage, not divided organization.
Pros:- Gas strut-assisted lid is designed for easier opening and closing.
- 39-inch length provides room for a range of trailer tools.
- Keyed lock and weather-resistant construction suit gear stored outdoors.
- Rust-resistant aluminum and tread-pattern finish are suited to vehicle use.
Cons:- One large compartment offers no built-in separation for small gear.
- At 16.3 pounds, handling and installation may take more effort than with smaller boxes.
- The long footprint may not fit every trailer tongue.
Best for: Trailer owners who want a wide, lockable tongue box with a lid designed for easier repeated access to shared tools and equipment.
Not ideal for: Buyers who need multiple compartments or a compact underbody box, or who prefer a lighter unit for installation.
- Material:Aluminum
- Dimensions:39 × 16.5 × 12 inches
- Weight:16.3 pounds
- Capacity:30 kg
- Color:Black
- Pattern:5-bar tread
- Features:Rust and wear resistance; weather resistant; gas strut lid
- Lock:Lock with two keys
Our verdict“Pick this VEVOR over the Confote 39-inch box if assisted lid access matters more than a simpler, compact storage layout.”
Confote 39 Inch Heavy Duty Aluminum Toolbox for Truck Bed RV Trailer Waterproof Storage Organizer with Lock and Keys
The Confote pairs a 39 × 13 × 10-inch profile with a listed 2.9-cubic-foot capacity, making it a straightforward lockable option for trailer, RV, or truck storage. Its weather guard seal and stainless steel latch address two common concerns for gear kept outside: moisture exposure and secure closure. Compared with the VEVOR Trailer Tongue Box, it is narrower and has no stated gas strut, so it gives up some width and assisted access in favor of a simpler format. It is also a larger, heavier commitment than the compact VEVOR Underbody Truck Box, and its single compartment will not sort small tools by itself. This model makes the most sense when a long, waterproof aluminum chest is wanted and the mounting area can accommodate its footprint.
Pros:- Listed 2.9-cubic-foot capacity in a 39-inch box.
- Weather guard seal is intended to protect contents from moisture.
- Lockable stainless steel latch adds keyed security.
- Versatile mounting uses include trucks, RVs, and trailers.
Cons:- Single compartment does not separate small tools or supplies.
- The 39-inch length may be too large for compact mounting spaces.
- No gas strut-assisted lid is listed, unlike the VEVOR Trailer Tongue Box.
Best for: RV and trailer owners seeking a long, lockable aluminum box for general tools and supplies, with a stated capacity of 2.9 cubic feet.
Not ideal for: Owners with narrow mounting areas, those needing divided storage, or buyers who want a gas strut-assisted lid.
- Material:Aluminum
- Dimensions:39 × 13 × 10 inches
- Capacity:2.9 cubic feet
- Weight:9.28 kg
- Color:Black
- Compartments:1
- Water resistance:Waterproof
- Lock and latch:Lockable stainless steel latch
Our verdict“Choose the Confote for long, sealed aluminum storage when its narrower profile suits your mounting space better than the wider VEVOR tongue box.”
Black Aluminum-Coated RV Trailer Toolbox, Waterproof Storage Box with Side Handles and Lock Keys (44″ x 15″ x 15″)
At 44 inches long, this box is the largest-format choice among the products here, giving buyers room for longer equipment than the 39-inch Confote or VEVOR tongue boxes. Its keyed stainless steel lock and waterproof construction suit gear carried on an RV, truck, or trailer, while the side handles are useful when the box needs to be moved rather than left permanently mounted. Those handles do not remove the burden of its substantial 44 × 15 × 15-inch size, and the product data does not list a weight, so buyers should not assume it will be easy to carry when loaded. Like the other large options, it has one compartment and offers no built-in sorting. This is a fit-led pick for buyers who need extra length and value portability at the empty-box stage.
Pros:- 44-inch length provides more room for long items than the 39-inch options.
- Waterproof construction is suited to outdoor vehicle storage.
- Keyed stainless steel lock secures the box.
- Side handles support carrying and repositioning.
Cons:- Large dimensions may not fit shorter trailer tongues or tight mounting areas.
- Single compartment offers no built-in organization.
- Product data does not provide a weight, making handling effort harder to judge.
Best for: RV and trailer owners who need a long lockable box for larger equipment and expect to reposition or carry the empty box using side handles.
Not ideal for: Owners with limited tongue or mounting space, buyers needing compartment dividers, or anyone seeking a compact underbody box.
- Material:Aluminum
- Color:Black
- Dimensions:44 × 15 × 15 inches
- Water resistance:Waterproof
- Lock:Keyed
- Included hardware:Stainless steel security lock and key
- Handles:Side handles
- Compartments:1
Our verdict“Choose this model over the 39-inch boxes when the extra length fits your vehicle and side handles matter for moving the empty box.”
39 inch Trailer Tongue Box, Aluminum Waterproof Lockable Storage Box
This 39-inch tongue box stands out for its trapezoidal shape and listed weight of 19.8 pounds, offering a defined fit for trailer-tongue storage without the extra length of the 44-inch Black Aluminum-Coated RV Trailer Toolbox. Its keyed lock, waterproof construction, and corrosion-resistant aluminum suit gear that stays outdoors, while slip-resistant stripes add texture to the exterior. The shape and fixed 39 × 15 × 12-inch size make fit checks important; the listing does not provide a capacity or describe a gas strut, unlike the VEVOR Trailer Tongue Box. That VEVOR is wider and specifically lists assisted lid support, while this model emphasizes a trapezoidal profile and versatile vehicle or workshop use. It is a reasonable match for buyers who value those traits, but not for anyone needing documented volume or easier lid assistance.
Pros:- Keyed lock provides secure closure for stored gear.
- Waterproof, corrosion-resistant aluminum is suited to outdoor use.
- Trapezoidal shape is designed for trailer-tongue storage.
- Slip-resistant stripes add texture to the exterior.
Cons:- Fixed 39-inch length may not fit smaller tongues or meet larger storage needs.
- No capacity figure is provided in the product data.
- No gas strut-assisted lid is listed.
Best for: Trailer owners who want a keyed, weather-resistant tongue box with a trapezoidal profile and a listed weight for installation planning.
Not ideal for: Buyers who need a capacity figure, multiple compartments, or a gas strut-assisted lid such as the one listed for the VEVOR Trailer Tongue Box.
- Material:Aluminum
- Dimensions:39 × 15 × 12 inches
- Weight:19.8 pounds
- Color:Black
- Shape:Trapezoidal
- Lock:Keyed
- Recommended uses:Trailer storage, truck beds, outdoor use, workshops
- Exterior detail:Slip-resistant stripes
Our verdict“Pick this box when its trapezoidal tongue fit and stated weight suit your setup, but choose the VEVOR if assisted lid access is a priority.”
20 Inch Aluminum Flatbox Truck Tool Box with Lock, Black, 20”x12”x9.5”
This is the most portable choice in this group: at 9.9 pounds and 20 inches long, it is easier to handle and fit into tight trailer or truck spaces than the MaxxHaul 80349, which weighs 45.1 pounds and is shaped for an A-frame tongue. Its aluminum body, weather-resistant lid seal, and keyed lock suit smaller essentials that need shelter from the elements and a basic barrier against casual access. The tradeoff is capacity: the listed 20-cubic-inch figure is unusually small for the stated dimensions, so I would verify usable space before buying, especially for bulky tools. It also lists five compartments without explaining their layout. Choose it for compact, lightweight storage; skip it if you need a clearly documented, high-capacity box.
Pros:- Lightweight aluminum construction is easier to position than the heavier steel boxes in this group.
- Weather-resistant lid seal helps shield contents from rain and road spray.
- Includes a lock and two keys.
- Compact 20-inch length can suit tighter mounting spaces.
Cons:- Listed capacity of 20 cubic inches appears inconsistent with the stated dimensions and should be confirmed.
- Limited dimensions are unsuitable for larger tools or bulky equipment.
- The five compartments are listed without details about their layout or usability.
Best for: Trailer owners seeking a lightweight, lockable box for small tools or roadside essentials in a space-constrained setup.
Not ideal for: Buyers storing large tools, batteries, or bulky gear, particularly if they need verified capacity or detailed interior organization.
- Material:Aluminum
- Dimensions:20 x 12 x 9.5 inches
- Weight:9.9 pounds
- Listed capacity:20 cubic inches
- Color:Black
- Compartments:5
- Lock:Included; two keys
Our verdict“Choose this compact aluminum box for lightweight, lockable storage of small essentials, but confirm its usable capacity before relying on it for tools.”
Trailer Tongue Tool Box, Steel Storage Truck Box, 26.6 x 13.6 x 11.9 inches, Waterproof, Lockable, Black
This keyed steel box offers a straightforward middle ground between the compact aluminum flatbox and the larger, A-frame-specific MaxxHaul 80349. Its 26.6-inch length gives it more room for tools or outdoor equipment than the 20-inch aluminum option, while the rubber seal and stated waterproof design target gear that stays mounted outside. The tradeoff is a single undivided compartment, so small parts can shift around unless you add organizers. Installation also calls for screws or brackets, and at 10.43 kg it is not as easy to move as the lighter aluminum flatbox. The listed maximum weight recommendation is 10 kg, which is below the box’s own stated weight; clarify that figure before loading it. This suits buyers who want a simple steel tongue box, not a tailored organizer.
Pros:- Steel construction gives the box a more substantial body than the compact aluminum flatbox.
- Rubber seal and stated waterproof rating are suited to exposed outdoor mounting.
- Keyed lock adds a barrier against casual access.
- 26.6-inch length offers more room than the 20-inch flatbox.
Cons:- Single compartment provides no built-in separation for small tools or parts.
- Requires screws or brackets for installation.
- The stated 10 kg maximum weight recommendation is below the listed 10.43 kg box weight and needs clarification.
Best for: Trailer and truck owners who want a mid-size, keyed steel box for mixed outdoor gear and can handle a bracket-based installation.
Not ideal for: Buyers who need built-in tool organization, frequent portability, or a box whose load limits are clearly stated and consistent.
- Material:Alloy steel
- Dimensions:26.6 x 13.6 x 11.9 inches
- Weight:10.43 kg
- Color:Black
- Compartments:1
- Lock:Keyed
- Weather resistance:Waterproof
- Maximum weight recommendation:10 kg
Our verdict“Pick this for mid-size, sealed steel storage if you can mount it securely and do not need built-in compartments.”
MaxxHaul 80349 Black Heavy-Duty Steel Trailer Tongue Box with Lock
For an A-frame trailer, the tapered trapezoid shape is the key distinction: it uses hitch-side space while aiming to preserve clearance, unlike the rectangular 26.6-inch steel tongue box, whose fit depends more on the mounting area available. A hand-welded alloy-steel body, powder-coated finish, weather seal, and keyed cam lock make this a substantial option for tools and gear carried outside. The cost of that heavier construction is practical, not cosmetic: at 45.1 pounds, installation may take help, and this shape is not a general-purpose fit for every trailer configuration. The listing also gives dimensions but no capacity or compartment count, so buyers should check the available tongue space and plan for one main storage area. I’d rank it highly for A-frame fit, not versatility.
Pros:- Tapered shape is designed to use A-frame tongue space without blocking clearance.
- Hand-welded steel body has a black powder-coated finish.
- Weather seal is intended to protect contents from moisture and dust.
- Keyed cam lock secures the lid.
Cons:- At 45.1 pounds, positioning and installation can be difficult for one person.
- A-frame-specific shape may not fit other trailer configurations.
- Capacity and internal compartment details are not listed.
Best for: A-frame trailer owners who want a fitted, lockable tongue box and have help available for installing a heavy steel unit.
Not ideal for: Owners of non-A-frame trailers, buyers prioritizing easy solo installation, or shoppers needing specified capacity and internal compartments.
- Brand:MaxxHaul
- Model:80349
- Material:Alloy steel
- Dimensions:34.25 x 14 x 12.75 inches
- Weight:45.1 pounds
- Color:Black
- Lock:Keyed cam lock
- Item type:Trailer tongue box
Our verdict“Choose the MaxxHaul 80349 when a purpose-shaped A-frame fit matters more than low weight or broad mounting compatibility.”
18 Inch Underbody Tool Boxes Set of 2 for Pickup Trucks, Waterproof Steel Storage Chest with T-Handle Latch and Keys
This set’s advantage is two separate lockable boxes, rather than one larger compartment: owners can divide gear between locations or keep tools apart from camping supplies. Each 18 x 12 x 14-inch chest is made from alloy steel and described as waterproof, with a keyed T-handle latch and two keys per box. That gives buyers more placement options than the single 26.6-inch steel tongue box, but it also means installing and securing two units rather than one. The description calls these underbody boxes, so fit and mounting clearance matter more than they do for a general tongue box; proper installation is specifically required. There are no drain holes, which makes sound mounting and seal care especially relevant. Pick this set for distributed storage, not a one-piece tongue-mounted solution.
Pros:- Two boxes allow gear to be divided by type or stored in separate locations.
- Alloy-steel construction is described as heavy-duty and impact resistant.
- Waterproof seals are intended for outdoor storage.
- Each box has a keyed lock and includes two keys.
Cons:- Two units require more installation work and mounting checks than a single box.
- No drain holes are listed, so trapped water has no stated drainage route.
- The fixed 18 x 12 x 14-inch size may not suit every underbody mounting space.
Best for: Truck or trailer owners who can mount two underbody boxes and want to separate tools and supplies across storage locations.
Not ideal for: Buyers seeking one tongue-mounted box, a quick installation, or drain holes for water management.
- Material:Alloy steel
- Dimensions per box:18 x 12 x 14 inches
- Number of units:2
- Lock type:Keyed T-handle latch
- Keys:Two per box
- Water resistance:Waterproof
- Color:Black
Our verdict“Choose this pair if you have suitable underbody mounting points and value separated, lockable storage over a single-box setup.”
30 Inch Steel Black Underbody Tool Box – Waterproof Truck Tool Chest with Lockable Latch for RVs, ATVs, Trailers & Trucks
At 30 x 18 x 18 inches, this is the largest single-box option in this batch, making it a better match for substantial tools and supplies than the 20-inch aluminum flatbox or either 18-inch chest in the two-box set. Its alloy-steel body, waterproof description, and keyed latch suit buyers who need enclosed storage on a truck, RV, ATV, or trailer. Bigger dimensions bring a fit penalty: underbody clearance and mounting space need careful checking, and the listing provides no weight or mounting hardware details. That leaves installation planning less certain than with the MaxxHaul 80349, which is described specifically for A-frame tongues, though that model is much heavier and less broadly positioned. Choose this for volume if your mounting location fits; skip it if you need a lighter box or a ready-to-mount package.
Pros:- 30 x 18 x 18-inch dimensions provide more single-box room than the compact options in this batch.
- Alloy-steel construction is suited to a durable vehicle-mounted storage chest.
- Waterproof design is intended to protect stored gear from wet conditions.
- Keyed latch provides lockable access.
Cons:- Large dimensions may not fit available underbody clearance or mounting points.
- No mounting hardware is listed as included.
- Product weight is not provided, making installation planning harder.
Best for: Owners of trucks, RVs, ATVs, or trailers with enough underbody clearance who need one roomy, lockable steel storage chest.
Not ideal for: Buyers with limited mounting space, those who need included mounting hardware, or anyone requiring a known box weight before installation.
- Dimensions:30 x 18 x 18 inches
- Material:Alloy steel
- Color:Black
- Water resistance:Waterproof
- Lock type:Keyed latch
- Intended applications:RVs, ATVs, trailers, and trucks
- Mounting hardware:Not included, according to product data
Our verdict“Choose this roomy steel chest if your vehicle has the clearance and you can source suitable mounting hardware separately.”
20 Inch Aluminum Truck Bed Tool Box with Side Handles and Lock
For a trailer owner who needs a compact, lockable place for frequently used gear, this 20-inch aluminum box keeps the footprint manageable while adding a keyed closure and a waterproof design. Its diamond-tread surface and corrosion-resistant material suit outdoor use, and the two included keys make it practical to share access. Compared with the longer 26 Inch Aluminum Utility Trailer Tongue Toolbox, this model takes up less room but offers less space for bulky equipment. The stated dimensions—20 by 12 by 9.5 inches—make that limitation clear: it is better for hand tools or small supplies than larger recovery gear. The basic lock also provides less reassurance for high-value items than a buyer might want from a dedicated security box.
Pros:- Waterproof design helps shield stored gear from moisture.
- Aluminum construction resists corrosion in outdoor use.
- Keyed lock includes two keys.
- Anti-slip diamond-tread surface adds grip.
Cons:- The 20-inch length limits storage for larger tools and equipment.
- Basic keyed lock may not suit high-security storage.
- Simple design lacks added organization features.
Best for: Trailer owners who need a compact, weather-resistant lockbox for hand tools, camping supplies, or small maintenance items.
Not ideal for: Buyers storing long or bulky tools, or anyone who needs a more tamper-resistant lock for valuable equipment.
- Material:Aluminum
- Dimensions:20 × 12 × 9.5 inches
- Lock:Keyed lock; two keys
- Water resistance:Waterproof
- Color:Black
- Opening mechanism:Latch
- Surface:Anti-slip diamond tread
Our verdict“Choose this compact aluminum box for small trailer essentials, but pick a longer model if your gear needs more room.”
26 Inch Aluminum Utility Trailer Tongue Toolbox with Lock & Keys, Black, 5 Bar Tread
This pick is purpose-built for buyers who want a lockable trailer-tongue box rather than a small general-purpose chest. At 26.4 inches long, it offers more room than the 20 Inch Aluminum Truck Bed Tool Box, while its aluminum body keeps the listed weight to 11.4 pounds. The powder-coated black finish and 5-bar tread construction are aimed at weather exposure and durability, and the lock comes with two keys. There is an important capacity discrepancy in the supplied details: the spec lists 26 pounds, while the cons state a recommended maximum of 12 pounds. I would treat it as light-duty storage until that limit is clarified. Its single compartment also offers less separation than an organizer with multiple sections.
Pros:- Trailer-tongue-focused format suits utility trailer and RV storage.
- Aluminum construction is lightweight and corrosion-resistant.
- Lock includes two keys for shared access.
- Powder-coated finish and 5-bar tread are suited to outdoor use.
Cons:- Capacity information conflicts: listed as 26 pounds, with a 12-pound recommended maximum also stated.
- Single compartment offers no built-in separation.
- Its 26.4-inch size may not fit every trailer tongue or storage location.
Best for: Trailer and RV owners seeking a tongue-mounted-style aluminum box for lightweight, weather-exposed supplies.
Not ideal for: People carrying heavy tools or needing multiple compartments; the supplied weight guidance is inconsistent and the box has one compartment.
- Dimensions:26.4 × 13.5 × 12.5 inches
- Weight:11.4 pounds
- Listed capacity:26 pounds
- Material:Aluminum
- Finish:Powder-coated black
- Tread pattern:5-bar tread
- Lock:Keyed lock; two keys
- Compartments:Single compartment
Our verdict“Pick this for lightweight trailer-tongue storage if its dimensions fit your setup, but clarify the stated load limit before carrying heavier gear.”
VEVOR Heavy Duty Aluminum Truck Bed Tool Box, 20″x12″x9.5″, Black
The VEVOR stands out for buyers prioritizing weather protection in a compact lockable box: its description specifies waterproof and dustproof construction, alongside rust-resistant aluminum alloy. At 20 by 12 by 9.5 inches, it shares the compact footprint of the 20 Inch Aluminum Truck Bed Tool Box with Side Handles and Lock, so neither is the right answer for bulky equipment. This VEVOR’s listed 9.6-pound weight and reinforced handles support carrying it between a truck, trailer, or RV, though a box of this size still favors smaller gear. The keyed lock adds a basic deterrent, not high-security protection. One compartment keeps the interior simple, so loose parts may need their own cases or pouches.
Pros:- Waterproof and dustproof design is suited to exposed storage.
- Aluminum alloy construction resists rust.
- Keyed lock provides a basic barrier to casual access.
- Reinforced handles support moving the box between vehicles.
Cons:- Compact 20-inch dimensions restrict the size of stored items.
- Single compartment provides no built-in organization.
- Basic keyed security may not protect valuable gear from determined theft.
Best for: Truck, trailer, and RV owners who want a compact lockable box for tools or supplies that need protection from dust and wet conditions.
Not ideal for: Buyers needing a large-capacity chest, separated storage, or strong protection for high-value equipment.
- Dimensions:20 × 12 × 9.5 inches
- Weight:9.6 pounds
- Material:Aluminum alloy
- Color:Black
- Lock:Keyed lock
- Compartments:1
- Protection:Waterproof and dustproof
- Handles:Reinforced
Our verdict“Choose the VEVOR for compact, weather-focused storage, and favor a larger tongue box when capacity matters more.”
Garvee Black Steel Truck Bed Tool Box, Trailer Tongue Box, Storage Organizer for Truck Bed, RV, Trailer
Among these four, the Garvee offers the largest listed dimensions at 30 × 15.5 × 15.5 inches and uses 12-gauge steel, making it the capacity-and-build choice rather than the easiest box to move. Its pneumatic lid is designed to help control opening and closing, a useful difference from the smaller aluminum boxes such as the VEVOR Heavy Duty Aluminum Truck Bed Tool Box. But this is not ready-made lockable storage: no lock is included, so buyers must supply a compatible padlock, and the supplied product data does not specify a keyed lock or keys. The steel construction also means installation and repositioning may take more effort than with the 11.4-pound aluminum tongue box. Choose it when size and a controlled-opening lid outweigh convenience.
Pros:- Largest listed dimensions among these four products provide room for more gear.
- 12-gauge steel construction is a sturdy alternative to aluminum boxes.
- Pneumatic lid supports controlled opening and closing.
- Multiple mounting options are described for trucks, trailers, and RVs.
Cons:- No lock is included, so secure closure requires a separate padlock.
- Steel construction may make installation and moving more difficult.
- The supplied specs do not provide a weight or specific weather-seal rating.
Best for: Trailer, RV, or truck owners who need a larger steel storage chest and are comfortable adding their own padlock.
Not ideal for: Buyers who require an included lock and keys, want lightweight installation, or need verified weather-seal details.
- Material:12-gauge steel
- Color:Black
- Dimensions:30 × 15.5 × 15.5 inches
- Item count:1
- Lid:Pneumatic lid
- Lock:Not included; padlock required
- Mounting:Multiple mounting options
Our verdict“Choose the Garvee for a larger, sturdy box with a pneumatic lid only if you are prepared to supply the padlock and handle a heavier installation.”
How We Picked
I compared the 14 listed products by the factors that shape a real trailer-box decision: mounting style, dimensions, material, locking hardware, and stated weather protection. I gave priority to options whose described format and size make their intended use clear, while distinguishing tongue-mounted boxes from underbody, truck-bed, and compact flatbox designs. I also treated the lock as a deterrent and access feature, not proof that any box is theft-proof, and treated waterproof wording as a claim to verify rather than a guarantee for every exposure.
The ranking logic favors a broadly useful fit and a clear balance of storage format and construction, then places more specialized choices according to who benefits from them. The VEVOR 39-inch tongue box leads as a versatile starting point; the aluminum Confote and other tongue boxes follow for buyers who want similar placement or different dimensions. Compact, underbody, and steel products rank by how well their distinct format serves a particular setup, not by an assumption that one material or size is best for everyone. Since these listings do not provide comparable capacity figures or detailed mounting measurements, buyers should confirm fit and hardware before ordering.
| trailer storage boxes lockable | Color |
|---|---|
| VEVOR Underbody Truck Box | Silver |
| VEVOR Trailer Tongue Box | Black |
| Confote 39 Inch Heavy Duty Alu | Black |
| Black Aluminum-Coated RV Trail | Black |
| 39 inch Trailer Tongue Box | Black |
| 20 Inch Aluminum Flatbox Truck | Black |
| Trailer Tongue Tool Box | Black |
| MaxxHaul 80349 Black Heavy-Dut | Black |
| 18 Inch Underbody Tool Boxes S | Black |
| 30 Inch Steel Black Underbody | Black |
| 20 Inch Aluminum Truck Bed Too | Black |
| 26 Inch Aluminum Utility Trail | — |
| VEVOR Heavy Duty Aluminum Truc | Black |
| Garvee Black Steel Truck Bed T | Black |
Factors to Consider When Choosing Trailer Storage Boxes Lockable
Choosing among lockable trailer storage boxes is less about finding the biggest box and more about matching its position, opening clearance, and construction to the trailer. I’d check the trailer itself before comparing product names: frame layout, tongue length, nearby equipment, and exposure to road spray can rule out a box that looks suitable on paper.
Choose the mounting position before the box size
A tongue box uses space near the coupler, while an underbody box needs a clear area beneath the frame and enough road clearance. Measure the intended mounting surface, then account for brackets, bolts, lid overhang, and the space needed to open the lid. A common mistake is matching only the box’s outside dimensions and overlooking the tow vehicle, jack, propane equipment, wiring, or spare tire. Tongue-mounted storage may affect access and add weight at the front of a trailer; underbody storage can be harder to reach and more exposed to road debris. If your frame has limited flat mounting area, a smaller box may be a safer choice than trying to make a larger one fit.
Treat listed dimensions as a fit check, not a capacity guarantee
Exterior measurements do not tell you how much usable space remains after walls, lid shape, and latch hardware are accounted for. Check the dimensions of the largest item you plan to store, including its handles or packaging, and compare them with the box opening rather than relying only on length and width. Long tools may fit in a 39-inch box but still be awkward to load through a narrower opening. Small boxes can be easier to place around existing trailer equipment, yet may not hold bulkier gear. If a listing does not give internal dimensions, ask the seller or plan around the stated outside measurements with extra room for the structure.
Balance material against trailer weight and exposure
Aluminum and steel are not interchangeable simply because both appear in lockable box listings. Material choice affects the weight added to the trailer, and the box’s loaded weight matters more than its empty shell alone. Steel options may suit buyers who prefer a steel enclosure, but their weight should be checked against the trailer’s load limits and the mounting surface. Aluminum models may help limit added weight, though construction details still matter for the type of gear and conditions involved. Review coating, seams, hinges, and the seller’s care instructions; a material label by itself does not establish how a box will handle corrosion or rough use.
Match weather claims to the gear you will store
Waterproof or weather-resistant wording can be useful, but it does not tell you how a box performs when spray hits from below, water pools around a seal, or a lid is left open. For tools that can tolerate occasional dampness, a locking box with a sound lid may be enough. For electronics, documents, or moisture-sensitive equipment, add a separate sealed container or dry bag rather than relying on the toolbox alone. Check whether the listing identifies a seal and how the lid closes, then inspect those parts during routine maintenance. Avoid assuming that a box described as waterproof will protect contents in every mounting orientation and weather condition.
Understand what the lock does—and does not—protect
A lock can discourage casual access and keep a lid closed during travel, but the product descriptions do not establish a particular security rating. Consider the value and portability of the items inside before treating the box as secure storage. Look at where the lock sits, whether keys are included, and whether the latch can be reached after the box is mounted. On an exposed trailer, a less visible mounting position may reduce attention but can make daily access less convenient. For costly gear, use the box as one layer of protection and avoid leaving valuable items in it unattended.
Check mounting hardware, service access, and maintenance
Not every listing makes clear which brackets or fasteners are included, so confirm the mounting method before purchase. The box, trailer frame, and fasteners need to work together; thin or uneven mounting surfaces may call for reinforcement or professional installation. Leave access to hinges, latch parts, and any nearby trailer components so routine checks do not require removing the box. Periodically inspect fasteners for movement, clean grit from the seal and latch, and address damaged coatings or seals before they worsen. These small checks matter especially for underbody boxes, which face more dirt and spray than storage mounted higher on the trailer.
Frequently Asked Questions
How do I know whether a tongue box will fit without interfering with towing?
Measure the tongue’s available width and length, then check how close the proposed box would sit to the coupler, jack, safety chains, wiring, and any mounted equipment. Allow room for the lid to open and for your hands to reach the latch. Check turning clearance between the trailer and tow vehicle, since a box that fits while parked can still interfere during a tight turn. Compare the box’s outside dimensions with the actual mounting area rather than relying on its product title. If the listing does not show mounting details, confirm them with the seller before ordering.
Is an aluminum box a better choice than a steel box for a trailer?
Neither material is automatically better; the right choice depends on the trailer’s weight allowance, mounting position, and storage needs. Aluminum listings in this roundup offer several tongue and compact formats, while steel options include tongue and underbody designs. Check the empty box weight and the weight of the gear you plan to carry, since both count toward the trailer’s load. Also compare coating, seals, hinges, and fastening points rather than judging durability from material alone. If you frequently travel on wet or gritty roads, plan to inspect and maintain the box whichever material you choose.
Can I store electronics or other moisture-sensitive gear in a box described as waterproof?
I would not rely on that wording alone for electronics, documents, or other items that can be damaged by moisture. Water can enter through a seal, hinge, or latch area, and underbody mounting adds exposure to spray and debris. Use a separate sealed case or dry bag inside the toolbox for sensitive gear. Check the box’s closure and seal periodically, especially after rough travel or maintenance work. This layered approach also helps if the box is opened in rain or left exposed for a long period.
When does a two-box underbody set make more sense than one larger box?
A paired set can help when the trailer has two suitable mounting locations and you want to separate equipment, such as tools from recovery gear. It may also fit a frame layout where one large enclosure would block another component. The tradeoff is that you need to secure and inspect two mounting points, and each individual box has limited room. Measure clearance beneath both proposed locations and check that the boxes will not reduce ground clearance or obstruct service access. If only one area is suitable, a single box matched to that spot is the simpler choice.
What should I verify before buying a lockable trailer storage box online?
Confirm the outside dimensions, mounting position, empty weight, and whether the listed lock includes keys. Ask whether mounting hardware is included and whether the product gives internal dimensions or a clear opening measurement. Check the lid’s opening direction and the room it needs, since nearby trailer parts can make access awkward. Read weather-protection claims as product descriptions, not a promise that contents will stay dry under every condition. Finally, compare the measurements with your actual trailer and the items you plan to store before placing the box.
Conclusion
For the best overall, I’d choose the VEVOR 39-inch Trailer Tongue Box as a broadly useful aluminum option, provided its dimensions suit your tongue. The best value in practical fit is the compact 20-inch aluminum flatbox for buyers who need a smaller lockable space and do not need a long storage bay. For a premium-style larger aluminum choice, the 44-inch black aluminum-coated box is the standout by listed size, though its fit and mounting details deserve close checking. Beginners may find a straightforward tongue box easier to assess than an underbody installation; start by measuring the available area and confirming hardware. For specific needs, choose the VEVOR 24-inch or 30-inch steel box for underbody storage, the 18-inch pair for split storage points, or a steel tongue box such as the MaxxHaul when that format suits your setup. The right pick is the one that fits securely, opens freely, and carries the gear you actually need—not simply the largest box in the lineup.
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