The UWS 48" topside tool box sits on top of the bed rail rather than down in the bed, so the entire bed floor stays free and you load the box standing beside the truck instead of climbing in. It runs 48" long, 13.75" wide and 17" tall for 6.3ft³ of storage behind one door that drops down on aircraft-grade stainless steel cables. The tub is one-piece 0.058" aluminum, the lockable T-handle gives one-hand access, and the MicroSeal gasket keeps rain and road grit out. Finished in gloss black powder coat. Two mounting legs and two keys are in the carton; the mounting bolts are not.
What's Included:
UWS 48" topside truck tool box
2 mounting legs
2 keys
Features
6.3ft³ Without Losing the Bed Floor Mounted on top of the bed rail, the box takes up rail space rather than bed space. The floor stays completely clear, which is why topsides are the default on flatbeds, dump bodies and service trucks that still need to haul.
Single-Door With Stainless Steel Aircraft Cables The single-door design drops down and is caught by aircraft-grade stainless steel cables that carry the weight and hold the opening steady. Cables are a wear item and UWS catalogs them as a replacement part, so a frayed cable is a cheap fix rather than a dead box.
One-Hand Access With a Lockable T-Handle The T-handle is keyed and folds flat when it is not in use, so there is nothing sticking out to catch a sleeve or a strap. One hand opens it, which matters when the other one is full.
One-Piece 0.058" Aluminum Tub Extra-thick aluminum, formed from a single sheet so there is no seam along the floor. It will not rust where the finish gets chipped, and at this length that thickness is what keeps the box from twisting on an uneven mount.
MicroSeal Gasket A full-perimeter gasket seals the door to the tub against rain, road spray and dust. It is the difference between dry tools and rusty ones after a wet week, and it is a stocked replacement part.
Designed, Fabricated and Welded in Florida UWS builds this box in its own Florida plant and backs it with a limited lifetime warranty on workmanship and materials, one year on the finish and one year on parts.
Fitment & Compatibility
Application
Fit
Flatbeds, stake beds and service bodies
✓ Yes, the intended application
Dump bodies and utility trailers
✓ Yes, anywhere there is a rail to bolt through
Full-size pickups with an 8' bed
✓ Yes
Full-size pickups with a 6'6" or shorter bed
✓ Yes on most, measure the rail run between the bulkhead and the wheel well first
Trucks running a tonneau cover or a cap
✗ No, the box stands 17" above the rail
Fit guidance: This is a universal-fit box, so measure rather than match a model year. You need 48" of straight rail to bolt to, 13.75" of width across the rail and 17" of clear height above it. Because it sits above the rail it will block a tonneau or a cap and it is visible in the mirrors, which is the accepted trade for keeping the bed floor free. The box is symmetrical and the legs bolt either way round, so it works on the driver or passenger side. Mounting bolts are not included.
Type: Bolts to the top of the truck bed rail or a flatbed rail using the two included legs · Time: About 1 hour · Tools: Drill and bit set, ratchet and socket set, tape measure, level, square, marker · Difficulty: Easy, DIY-friendly, but a second person makes it much easier to hold at this length
The legs and keys ship with the box; the bolts do not, because the correct fastener depends on whether you are going through a bed rail, a stake pocket or a flatbed frame. Set the box up, level it, mark through the legs and check what is behind the rail before you drill. Get a hand to hold it: at 48" this box is awkward to balance alone. UWS is explicit that a tool box is not a place for flammables or hazardous material, so no fuel cans, solvents, propane or cutting torches. Never load past the vehicle manufacturer's rated capacity.
Resources
Everything you need for your UWS 48" Topside Truck Tool Box, Single-Door Gloss Black Aluminum, in one place.
Warranty. Limited Lifetime Warranty (One-Year Finish, One-Year Parts) from UWS, covering workmanship and materials. Normal wear, damage from overloading, and damage from improper installation are not covered. UWS stocks handles, locks, gas struts, gaskets, cables and keys as individual service parts.
Free shipping. This item ships free to the lower 48 states. Because it is an oversized item, it ships by freight and typically arrives in 3 to 7 business days.
Inspect on delivery. Please inspect the packaging before signing. If you see any damage, note it on the delivery receipt and contact us right away, and we will make it right.
About UWS
UWS is short for United Welding Services, and the name is the point. The aluminum boxes in this line are designed, fabricated and welded in Florida rather than assembled from imported panels, and the tub is formed from one piece of extra-thick aluminum so there is no seam along the floor of the box for water to work its way into. UWS is part of the CURT Group, a Lippert company, which is what puts a national warranty and a real replacement-parts program behind a box that is still built in a single plant. Handles, gas struts, lid gaskets, striker brackets and keys are all cataloged parts you can buy years later, which is the practical difference between a box you repair and a box you replace.
A topside is the right answer when the bed itself has to stay usable. Because the box sits above the rail on its two legs, you keep the full bed floor for pipe, lumber or a pallet, and you get at your tools from ground level with the tailgate shut. The trade-off is height: this box stands 17" above the rail, so it is visible in the mirrors and it will not live under a tonneau. On a service truck or a flatbed that is exactly what you want, and the drop-down door puts the whole opening in front of you instead of making you reach over a lid.
Prestige Truck is an authorized UWS dealer. Every box we ship is new and in the factory carton, covered by the full UWS factory warranty, and backed by the UWS replacement-parts program if a handle, strut, gasket or key ever needs renewing.
Frequently Asked Questions
Straight answers on specs, fit and support
Where does the 48" topside box actually mount?
On top of the bed rail, standing on its two included legs, not down inside the bed. That keeps the bed floor completely clear and puts the doors at a height you can work from while standing next to the truck. You need 48" of straight rail to bolt through.
Can I still use a tonneau cover or a cap?
No. The box stands 17" above the rail, which is where a tonneau or cap needs to sit. If you want a covered bed, look at a UWS crossover box, which mounts down between the rails, or a side box that sits inside the bed wall.
Why one door?
One door across the full opening gives you the widest possible reach into the box, which is the right call at this length. It drops on stainless cables so it stays put while you work.
Is the mounting hardware included?
The two legs and two keys are in the carton, but the bolts are not. UWS leaves them out because the right fastener depends entirely on what you are bolting to. Budget for hardware suited to your rail.
How is the door supported when it is open?
Aircraft-grade stainless steel cables catch the door and hold it. They are stainless so they do not rust into a weak point, and if one is ever damaged the door cable is a stocked UWS service part.
What does the warranty cover?
A limited lifetime warranty on workmanship and materials, one year on the finish and one year on parts. Wear items and damage from overloading or improper installation are excluded. T-handles, cables, gaskets and keys are all available as UWS service parts.
Mark K.
Look is great. 100 lbs
Look is great. 100 lbs lighter than my 2nd pick. Lid lock and opening are smooth. Only minor knock I give is the the tie down hooks are hard to install - thinking I should have done them before installing.
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A must have
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Roy L.
I never knew how much I needed this
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Better then expected.
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Joseph A.
The toolbox is nice. I
The toolbox is nice. I think Ill get a lot of years of service out of it. I like how the lid opens and the tie downs are a nice touch. It seems to be well built. And tough. Im pleased with my purchase and would buy another one.
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