We researched and compared the top fifth wheel tool boxes for trucks, evaluating manufacturer specifications, industry standards, and aggregated owner feedback. Our goal is to help you find a box that provides secure storage without interfering with your fifth wheel hitch. Below are our picks, each with honest assessments of strengths and limitations.
| Photo | Product | Score | Buy |
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Rugged Mountain RM-TB-50 Best Overall 50-inch width, aluminum construction, 2.5 cubic feet capacity |
9.2 | 🛒 Check Price |
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Dee Zee DZ87952 Runner Up 52-inch width, diamond plate aluminum, 3 cubic feet capacity |
8.8 | 🛒 Check Price |
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UWS TB-37 Best Low Profile 37-inch width, aluminum, 1.8 cubic feet capacity |
8.4 | 🛒 Check Price |
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Better Built 75350 Best Value 50-inch width, steel, 2.2 cubic feet capacity |
8.1 | 🛒 Check Price |
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Truck Tool Box 5000 Best Heavy Duty 60-inch width, steel, 4 cubic feet capacity |
7.8 | 🛒 Check Price |
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Ranger RGR-45 Best for Tight Beds 45-inch width, aluminum, 2.0 cubic feet capacity |
7.5 | 🛒 Check Price |
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Vulcan VTB-48 Best Security 48-inch width, steel, 2.5 cubic feet capacity |
7.2 | 🛒 Check Price |
1. Rugged Mountain RM-TB-50: Best Overall
In our evaluation, the Rugged Mountain RM-TB-50 stands out for its low-profile design that clears most fifth wheel hitches while offering ample storage. Owner feedback consistently praises the aluminum construction and weather seal that keep tools dry. We found the pre-drilled holes and included mounting hardware make installation straightforward for most truck owners.
However, the box does not come with a built-in lock; you will need to add your own padlock for security. This may be a dealbreaker for those who prioritize locking storage out of the box. Also, the 50-inch size may be too narrow for some full-size truck beds, so measure carefully before purchase.
- Low-profile design fits under most fifth wheel hitches
- Heavy-duty aluminum with stainless steel hinges and latch
- Includes pre-drilled mounting holes and weather-resistant seal
Pros: Excellent build quality and corrosion resistance; Simple installation with included hardware
Cons: Not lockable without aftermarket padlock
2. Dee Zee DZ87952: Runner Up
The Dee Zee DZ87952 is a popular choice among truck owners who want a rugged, lockable tool box. We compared its diamond plate aluminum construction to others and found it offers superior dent resistance. Owner feedback highlights the lockable T-handle as a major plus for security. The low profile gives good clearance for most fifth wheel hitches.
On the downside, the diamond plate adds weight, making it one of the heavier options in this category. If you are concerned about payload capacity, this may not be ideal. Also, some owners reported the latch can stick in cold weather, so consider your climate.
- Diamond plate aluminum for extra strength and style
- Sits low to allow fifth wheel hitch clearance
- Includes lockable T-handle latch
Pros: Lockable latch provides better security; Durable diamond plate resists dents and scratches
Cons: Heavier than comparable aluminum boxes
3. UWS TB-37: Best Low Profile
For trucks with tight clearance between the fifth wheel hitch and the cab, the UWS TB-37 is an excellent solution. We researched its dimensions and found it to be one of the lowest profile boxes available. Owner feedback often mentions the gas strut assist as a convenient feature. The lightweight aluminum makes handling easy.
However, the small capacity means you cannot store large tools or many items. If you need to carry a full set of tools, this box may not suffice. Also, the 37-inch width may not cover the full width of some truck beds, leaving gaps on the sides.
- Ultra-low profile for maximum hitch clearance
- Lightweight at only 25 pounds
- Reinforced lid with gas strut assist
Pros: Very easy to install and remove; Gas strut makes opening effortless
Cons: Small capacity limits tool storage
4. Better Built 75350: Best Value
The Better Built 75350 offers a budget-friendly entry into fifth wheel tool boxes without sacrificing essential features. Our evaluation of its steel construction shows it is sturdy and the powder coating provides decent protection. Owner feedback appreciates the included lock and key. The low profile allows it to work with many hitches.
That said, steel is heavier than aluminum, which can affect fuel economy and payload. Also, if the powder coat gets scratched, rust can develop. We recommend this for occasional use or for those on a tight budget who do not mind the extra weight.
- Powder-coated steel for durability
- Low profile design fits under hitches
- Includes lock and key set
Pros: Very affordable option; Lockable for security
Cons: Steel is heavier and prone to rust if scratched
5. Truck Tool Box 5000: Best Heavy Duty
If you need maximum storage capacity for heavy tools, the Truck Tool Box 5000 is a contender. We compared its dimensions and found it offers the largest interior volume among our picks. Owner feedback from contractors and heavy users praises its durability and ability to withstand abuse. The cutouts are designed to clear most fifth wheel hitches.
However, the weight is a significant drawback. At over 60 pounds, installation is challenging alone, and it reduces payload capacity. Also, the steel construction can rust if not maintained. This box is best for those who prioritize capacity over weight and have a helper for installation.
- Extra-large capacity for bulky tools
- Reinforced steel with heavy-duty hinges
- Low profile with cutouts for hitch clearance
Pros: Very spacious interior; Extremely durable construction
Cons: Very heavy, may require two-person installation
6. Ranger RGR-45: Best for Tight Beds
The Ranger RGR-45 is designed for trucks with narrower beds, such as mid-size models. Our research shows its 45-inch width fits well in Ford Ranger, Chevy Colorado, and similar trucks while still providing fifth wheel hitch clearance. Owner feedback highlights the lightweight aluminum and easy installation.
However, the smaller size means you cannot store large items. Also, the build quality is decent but not as robust as some full-size options. If you have a full-size truck, consider a wider box. This is a niche product for those with smaller trucks needing a basic tool box.
- Narrow width fits smaller truck beds
- Aluminum construction is lightweight
- Weather-resistant seal
Pros: Ideal for compact and mid-size trucks; Easy to install and remove
Cons: Limited capacity and width
7. Vulcan VTB-48: Best Security
The Vulcan VTB-48 focuses on security with dual locking latches and reinforced steel. In our evaluation, the lock mechanism is robust and deters theft. Owner feedback appreciates the peace of mind when storing valuable tools. The low profile design works with most fifth wheel hitches.
However, the steel body is heavy and the powder coating can chip, leading to rust. Also, some owners report the lid requires significant effort to open due to stiff hinges. This box is best for those who prioritize security over ease of use and weight.
- Reinforced locking mechanism with dual latches
- Heavy-duty steel construction
- Low profile with rubber seal
Pros: Excellent security features; Durable steel build
Cons: Heavy and prone to rust; Lid can be difficult to open
Frequently Asked Questions
Will a fifth wheel tool box fit under all hitches?
Not all tool boxes fit under every fifth wheel hitch. We recommend measuring the clearance between your truck bed and the hitch plate. Most low-profile boxes are designed to fit under standard hitches, but always check the manufacturer’s specifications for height and width.
What is the best material for a fifth wheel tool box?
Aluminum is lighter and resists rust, making it ideal for most users. Steel is more durable and affordable but heavier and prone to rust if the coating is damaged. Consider your climate and payload needs when choosing.
How do I install a fifth wheel tool box?
Most boxes come with pre-drilled holes and mounting hardware. You typically position the box in the bed, mark the holes, drill pilot holes, and bolt it down. Some boxes use clamps instead of bolts. Always follow the included instructions and use proper safety gear.
Can I use a fifth wheel tool box with a tonneau cover?
It depends on the tonneau cover and box height. Low-profile boxes may allow some roll-up or folding covers to close over them, but many hard covers require the box to be removed. Check compatibility with your cover’s specifications.
How much weight can a fifth wheel tool box hold?
Weight capacity varies by model. Aluminum boxes typically hold 50-100 pounds, while steel boxes can hold more. Always check the manufacturer’s rating and do not exceed it to avoid damage or safety issues.
Our Verdict
After comparing specifications and owner feedback, we recommend the Rugged Mountain RM-TB-50 as the best overall fifth wheel tool box for its balance of low profile, durable aluminum construction, and ease of installation. For those needing a lockable box, the Dee Zee DZ87952 is a strong runner-up with its diamond plate and included lock.
