Keep tools locked down and off the bed floor with the Weather Guard 178-5-04 low profile lo-side truck tool box. This 56" box wears a deep gloss black ARMOR TUF finish over aluminum diamond plate. Gloss black turns a plain work box into a finished, blacked-out upgrade with a deep shine that stands out against a bright bed. It mounts on top of one bed side rail so it rides low, preserves your rear visibility and leaves the bed floor open for sheet goods and cargo, and it locks down 4.0ft³ of weather-sealed storage behind the tamper-resistant 1Key UltraLock push-button lock. Aluminum keeps it lighter than a comparable steel box, so it will not eat into your payload.
What's Included:
178 Series 56" Low Profile Lo-Side aluminum truck tool box in gloss black
1Key UltraLock keyed cylinder with recessed red push-button latch
Under-rail mounting clamps and hardware for a no-drill install
Gas strut for controlled lid lift
Removable tray
Full-perimeter weather seal, pre-installed
Drain plug
Weather Guard installation instructions
Features
56" of Secure Side-Rail Storage At 56" long the 178-5-04 runs along one bed side rail and gives you 4.0ft³ of lockable, organized storage while keeping the rest of the bed floor clear. It carries a full day of hand and power tools without taking over the bed.
Gloss Black Diamond Plate Finish A Gloss Black ARMOR TUF powder coat wraps the aluminum diamond plate in a deep, glossy black that fights chips, road salt and UV fade. It gives a working truck a finished, blacked-out look without the added weight of steel.
Blacked-Out Curb Appeal Gloss black is the go-to for a modern, blacked-out truck, and it ties in with black bumpers, black wheels and black trim packages. The deep gloss reads as an upgrade over plain aluminum without adding the weight of steel.
Gas Strut and Reinforced Lid A gas strut controls how the reinforced lid opens and closes for smooth, one-handed access, and the lid opens to about 90 degrees and resists flex even when you lean on it. An optimized latch needs less force to close.
1Key UltraLock Security A tamper-resistant lock pairs a keyed cylinder with a recessed red push-button that sits flush when locked, giving you a quick visual cue your gear is secured. The 1Key system lets you code multiple boxes on a truck or a whole fleet to one key.
Full-Perimeter Weather Seal A memory-resistant, multi-ridge weather strip runs the entire lid perimeter to keep rain, dust and debris out, and a drain plug lets any moisture that does get in escape, so your tools stay dry and ready on wet and dusty jobsites.
Reinforced Body, Automotive-Grade Hardware Weather Guard specifies a heavy-duty welded body for the 178-5-04, with a C-channel reinforced front panel and a heavy-duty C-channel reinforced lid, so the box stays square when it is loaded and when someone stands on the lid. The latch is an automotive dual-stage rotary mechanism, the same style a truck door uses, so it pulls the lid down onto the seal instead of relying on a friction catch. A welded gas strut shield keeps loose tools from knocking the strut mount out of line. The D-shaped ribbed weather strip is memory resistant, so it springs back after years of closing rather than taking a set and letting water track in.
● Usually yes, measure your side rail length first
Mid-size
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Ranger, Colorado, Tacoma, Frontier
● Often fits, measure the usable rail length before ordering
Fit guidance: Lo-Side boxes mount on top of one bed side rail, so they keep the bed floor open and leave the rest of the bed clear for cargo. The low-profile design rides low on the rail to keep your rear sightlines open and leave maximum bed clearance for larger cargo. At 56" long this box fits most full-size 6'6" and 8' beds with room to spare, fits many full-size 5'6" short beds, and fits a lot of mid-size trucks. It mounts on either the driver or passenger side rail. Always measure your usable bed side rail length and confirm clearance behind the cab before ordering.
Type: Side-rail mount, clamp-in with no drilling · Time: About 20 to 30 minutes · Tools: Socket or wrench set and a tape measure; no drill needed with the included under-rail clamps · Difficulty: Easy, best done with two people because of the length
Set the box on top of one bed side rail and position it front to back, then hook the included clamps under the rail lip and tighten the hardware evenly so the box sits flat and the lid seals. Because the box is long, have a second person help lift and steady it while you clamp it down. Follow the Weather Guard installation instructions for exact clamp placement and torque.
Watch the installation walkthrough:
Resources
Everything you need for your Weather Guard 178 Low Profile Lo-Side Truck Tool Box, 56" Gloss Black Aluminum Diamond Plate, in one place.
Warranty. Limited Lifetime Warranty from Weather Guard against defects in materials and workmanship.
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 Weather Guard
Weather Guard has built professional-grade truck and van storage in the USA for decades and is the storage brand tradespeople, contractors, and fleets reach for first. Its steel and aluminum tool boxes, ladder racks, and van-interior systems are engineered to survive daily jobsite abuse and keep expensive tools secure and organized.
Known for weather-tight seals, patented locking systems, and heavy-gauge construction, Weather Guard products mount cleanly on work trucks and vans and stand up to years of hard use. The lineup spans crossover, low-side, and saddle truck boxes, ladder and van racks, drawer units, and fuel and utility tanks, so an entire work vehicle can be outfitted from one brand.
Backed by a strong manufacturer warranty and US-based support, Weather Guard is the name pros trust to protect the tools their livelihood depends on.
Authorized Weather Guard dealer. Prestige Truck is an authorized dealer of Weather Guard, so every tool box, rack and storage product you buy is 100% genuine and factory-new, covered by the full Weather Guard manufacturer warranty, and backed by our own US-based support team.
Compare The Range
How this compares to similar models
The closest alternatives side by side, so you do not have to keep tabs open.
Model
This OneWeather Guard 178 Low Profile Lo-Side Truck Tool Box, 56" Gloss Black Aluminum Diamond Plate (178-5-04)
A step-by-step look from Weather Guard at what the 1Key UltraLock actually does: how the cylinder accepts a new code, why the red push button retracts when the box is locked, and how the latch pulls the lid down against the seal. Worth two minutes before you set the box up.
How to Code Your 1Key UltraLock Lock
Weather Guard's official walkthrough for coding the lock so this box opens with the same key as the rest of your Weather Guard boxes. Follow it once when the box arrives and you can stop carrying a separate key for every lid on the truck.
Protect Your Gear and Your Reputation
Weather Guard's own film on why a working truck earns its keep from what is bolted to it. It frames the boxes, racks and bed equipment as the difference between arriving ready and arriving short, which is the thing a customer actually notices.
It is a short manufacturer-made overview rather than a product demo, so watch it for the why rather than the how. If you are outfitting a truck from scratch it is a useful place to start before you pick individual part numbers.
Frequently Asked Questions
Straight answers on specs, fit and support
What bed size do I need for the 178-5-04?
This box is 56" long and mounts on one bed side rail, so it fits most full-size 6'6" and 8' beds easily, fits many 5'6" short beds, and fits a lot of mid-size trucks. Measure your usable side rail length and confirm clearance behind the cab before ordering.
What is the finish on the 178-5-04?
It is aluminum diamond plate finished in Gloss Black ARMOR TUF powder coat for a deep, glossy blacked-out look. The powder coat resists chips, salt and fading, and it pairs well with black trim and blacked-out trucks.
Who is the gloss black finish for?
Gloss black is the pick for a blacked-out build, and it ties in with black wheels, black trim and black bumpers. It shows a little more dust and fingerprints than matte, but the deep shine reads as a premium upgrade.
How big is it, and is it covered by a warranty?
The exterior measures about 56"L x 17"W x 13"H with 4.0ft³ of storage, and it weighs about 49.5 lb. It is built from welded aluminum diamond plate in gloss black, and it is made in the USA and backed by a Weather Guard Limited Lifetime Warranty against defects in materials and workmanship.
How does it lock?
It uses the Weather Guard 1Key UltraLock, a tamper-resistant design that pairs a keyed cylinder with a recessed red push-button that sits flush when locked. The 1Key system also lets you code multiple boxes on a truck or an entire fleet to a single key.
Can I run electrical accessories with it?
Yes. The box includes 12V access for electrical upfits, so you can wire in lights or other accessories, and enhanced tie-down buckles give you extra clearance for straps on the lid.
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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The toolbox is nice. I
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