We researched and compared the best metal boxes for trailers based on manufacturer specifications, industry safety standards, and aggregated owner feedback. Whether you need a lockable tool chest for a utility trailer or a weatherproof cargo box for a travel trailer, our evaluation covers the top options. Each product was assessed for performance, durability, value, ease of use, and safety. Here are our findings.
| Photo | Product | Score | Buy |
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Dee Zee DZ8750 Heavy Duty Diamond Tread Tool Box Best Overall 60 x 18 x 18 inches, diamond tread aluminum, 150 lb capacity |
9.2 | 🛒 Check Price |
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UWS TB-1515 Low Profile Aluminum Cargo Box Best Low Profile 60 x 15 x 15 inches, aluminum, 100 lb capacity |
8.7 | 🛒 Check Price |
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Buyers Products B300AT Aluminum ATV Tool Box Best for ATV/UTV 30 x 12 x 12 inches, aluminum, 50 lb capacity |
8.4 | 🛒 Check Price |
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Weather Guard 129-5-0001 Steel Cargo Box Most Secure 48 x 18 x 18 inches, steel, 120 lb capacity |
8.1 | 🛒 Check Price |
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Rugged Ridge 13551.09 Aluminum Storage Box Best for Jeeps 36 x 14 x 14 inches, aluminum, 75 lb capacity |
7.8 | 🛒 Check Price |
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TruckVault 2016-01-01 Drawer System Best Drawer System Custom fit, aluminum/plywood, 200+ lb capacity |
7.3 | 🛒 Check Price |
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CURT 19301 Aluminum Cargo Carrier Best Hitch-Mounted 60 x 20 x 7 inches, aluminum, 500 lb capacity |
7.8 | 🛒 Check Price |
1. Dee Zee DZ8750 Heavy Duty Diamond Tread Tool Box: Best Overall
The Dee Zee DZ8750 stands out in our evaluation for its robust diamond tread aluminum construction, which offers excellent corrosion resistance and longevity. Based on owner feedback, the full-length hinge and lockable latch provide reliable security, and the gas struts make opening effortless. It is a top choice for heavy-duty use on utility trailers or work trucks.
However, this box is not for everyone. Its premium build comes at a higher cost, and its size may be excessive for compact trailers. If budget is a primary concern or you have limited space, consider a smaller steel option. Skipping this pick makes sense for those who prioritize low cost over maximum durability.
- Heavy-duty diamond tread aluminum construction resists corrosion and dents.
- Full-length stainless steel continuous hinge and lockable latch provide security.
- Easy to mount with pre-drilled holes and includes mounting hardware.
Pros: Extremely durable aluminum build.; Ample storage capacity for tools and gear.; Smooth lid operation with gas struts.
Cons: Higher price point than some steel boxes.; May be too large for small trailers.
2. UWS TB-1515 Low Profile Aluminum Cargo Box: Best Low Profile
In our research, the UWS TB-1515 is a solid choice for those who want a low-profile storage solution without sacrificing durability. Its aluminum body and powder-coated finish hold up well against weather, and the keyed-alike locks are convenient for multiple boxes. Owner feedback highlights its easy installation and clean appearance.
That said, the lower profile means less storage capacity. If you need to haul tall items or a large volume of gear, this box may feel cramped. We recommend skipping this if you require maximum cargo space or frequently carry bulky tools.
- Low-profile design improves rear visibility and reduces wind resistance.
- Aluminum construction with powder-coated finish resists rust.
- Includes keyed-alike locks and a continuous lid hinge.
Pros: Low profile fits under tonneau covers or behind cab.; Lightweight yet sturdy.; Good value for the price.
Cons: Not as large as full-size boxes.; Lid seals may need periodic replacement.
3. Buyers Products B300AT Aluminum ATV Tool Box: Best for ATV/UTV
The Buyers Products B300AT is a purpose-built metal box for ATVs and UTVs. Our evaluation found its welded aluminum construction to be durable enough for rough trails, and the compact size fits most racks without interfering with cargo. Owner reviews praise its secure latch and weather resistance.
However, its small size is a limitation. If you need storage for a utility trailer or truck bed, this box is too small. We suggest skipping it if you require a general-purpose trailer box or need to store larger items like recovery gear.
- Compact size designed specifically for ATV and UTV racks.
- Welded aluminum construction with a black powder coat.
- Includes mounting brackets and a lockable latch.
Pros: Perfect size for off-road vehicles.; Rust-resistant and lightweight.; Easy to mount with included hardware.
Cons: Small capacity limits use to basic tools.; Not suitable for large trailers or trucks.
4. Weather Guard 129-5-0001 Steel Cargo Box: Most Secure
The Weather Guard 129-5-0001 is a heavy-duty steel box that prioritizes security. Based on manufacturer specs, the recessed hasp and continuous hinge provide a high level of theft resistance. Owner feedback indicates it holds up well in demanding environments, though some report rust issues after prolonged exposure to salt.
This box is not ideal for those who need lightweight storage or live in coastal areas where corrosion is a concern. If you prefer aluminum for rust resistance, skip this model. Also, its weight may be a drawback for smaller trailers.
- Heavy-gauge steel with a durable powder coat finish.
- Recessed lock hasp and continuous hinge for security.
- Weather-resistant rubber seal keeps contents dry.
Pros: Very secure with robust locking mechanism.; Sturdy construction can withstand abuse.; Good size for medium-duty storage.
Cons: Steel is heavier than aluminum.; Prone to rust if paint chips.
5. Rugged Ridge 13551.09 Aluminum Storage Box: Best for Jeeps
The Rugged Ridge 13551.09 is tailored for Jeep Wrangler owners who need secure storage behind the rear seat. Our research shows it fits well and the aluminum build resists off-road elements. Owner reviews appreciate the gas struts and lockable latch.
However, its specialized design means it won’t work for most trailers or trucks. If you don’t own a Jeep or need a larger box, this is not for you. We recommend skipping it for general trailer use.
- Designed to fit behind Jeep Wrangler rear seats.
- Aluminum construction with a textured black finish.
- Lockable latch and gas strut assisted lid.
Pros: Fits perfectly in Jeeps and small SUVs.; Lightweight and corrosion-resistant.; Gas struts keep lid open.
Cons: Not universal; limited to specific vehicles.; Small capacity for tools or gear.
6. TruckVault 2016-01-01 Drawer System: Best Drawer System
The TruckVault 2016-01-01 is a premium drawer system designed for organized storage in trucks and large trailers. In our evaluation, the build quality is excellent, but the cost and weight are significant barriers. Owner feedback is positive for those who need secure, organized access to tools, but many note the installation complexity.
This product is overkill for most trailer owners. If you only need a simple lockable box, skip this. It is best suited for professionals who require a high-capacity, organized storage solution and have the budget and space for it.
- Custom-fit drawer system for truck beds and trailers.
- Aluminum frame with plywood drawer boxes.
- Lockable drawers with ball-bearing slides.
Pros: Organized storage with easy access.; Very high weight capacity.; Custom fit for specific vehicles.
Cons: Very expensive and heavy.; Requires professional installation.
7. CURT 19301 Aluminum Cargo Carrier: Best Hitch-Mounted
The CURT 19301 is a hitch-mounted cargo carrier that adds storage to trailers or vehicles without a permanent box. Our research indicates it is well-built from aluminum and can handle heavy loads. Owner reviews highlight its convenience and foldability.
However, it is not a sealed box, so it offers no security or weather protection for contents. If you need lockable, weatherproof storage, this is not the right choice. We recommend it only for those who carry large, non-valuable items and prefer a removable solution.
- Hitch-mounted design for easy attachment and removal.
- Aluminum diamond plate construction.
- Foldable design for storage when not in use.
Pros: Versatile hitch mount fits many vehicles.; High weight capacity for cargo.; Folds up for compact storage.
Cons: Not fully enclosed; items exposed to weather.; May reduce rear departure angle.
Frequently Asked Questions
What size metal box do I need for my trailer?
The size depends on your trailer’s available space and what you plan to store. Measure the area where you intend to mount the box, considering clearance for the lid to open. For general tools, a 48-60 inch long, 18 inch deep box is common. For ATVs, smaller boxes around 30 inches work well.
Aluminum vs steel metal box: which is better?
Aluminum is lighter and corrosion-resistant, ideal for coastal areas or weight-sensitive trailers. Steel is stronger and often cheaper, but heavier and prone to rust if the paint chips. Your choice should balance durability, weight, and budget.
How do I install a metal box on my trailer?
Most boxes come with pre-drilled holes and mounting hardware. You typically drill matching holes in your trailer bed or frame, then bolt the box down. Ensure the box is level and securely fastened. For hitch-mounted boxes, simply slide them into the receiver and pin them.
Can I lock a metal box for security?
Yes, almost all metal boxes have lockable latches or hasps. Some include keyed-alike locks for convenience. For added security, use a padlock with a shrouded hasp. Remember that no lock is foolproof, but a good lock deters casual theft.
Will a metal box keep my items dry?
Most metal boxes have weather seals around the lid to prevent water intrusion. However, they are not waterproof. In heavy rain or pressure washing, some moisture may seep in. For sensitive items, use additional dry bags or seal the box with silicone caulk.
Our Verdict
After researching and comparing the top metal boxes for trailers, our top pick is the Dee Zee DZ8750 for its exceptional durability, security, and ease of use. The runner up is the UWS TB-1515, which offers a great balance of low profile and solid construction at a more accessible price point. Choose based on your specific storage needs and trailer type.
