The Great Toolbox Debate
Walk any job site and you'll see two camps: the diamond plate crowd and the smooth aluminum loyalists. Both have their reasons, and both are convinced the other is wrong. We've been running both finishes for two years across different trucks. Here's what we actually found.
Diamond Plate: Looks Tough, Acts Tougher
Diamond plate (also called tread plate) has raised patterns that add structural rigidity — the bumps aren't just for looks. They distribute impact force across a wider area, which means a dropped wrench or a sliding tool box is less likely to dent the surface.
The trade-off? Those raised patterns collect dirt, grime, and water. Cleaning a diamond plate box takes three times longer than a smooth one, and if you let it go, the grooves start corroding faster than flat surfaces.
UWS and Dee Zee both make solid diamond plate boxes. The welding quality varies, but the finish itself is consistent across manufacturers.
Smooth Aluminum: Clean and Classic
Smooth aluminum is easier to clean, easier to polish, and has a cleaner look. But it shows every scratch and dent. A dropped tool that would bounce off diamond plate leaves a permanent mark on smooth aluminum.
ATI's 95 Gallon Black L-Shape Transfer Tank + Toolbox Combo takes a different approach — smooth aluminum construction with a satin black powder coat. You get the cleanability of smooth aluminum with a finish that hides scratches far better than bare metal.
Our top-rated pick for this category. Available at Big League Accessories with 30-day returns and expert support.
The Powder Coat Factor
Here's where the conversation shifts: powder-coated smooth aluminum beats both bare options. The satin black finish on ATI's combo unit doesn't show scratches the way bare aluminum does, it doesn't collect grime in grooves like diamond plate, and it has a professional look that matches modern truck aesthetics.
Weather Guard's black powder coat is comparable, but ATI's integrated tank-and-toolbox design means you're getting storage and fuel capacity in one footprint.
The Verdict
If you're choosing between bare diamond plate and bare smooth aluminum, go diamond plate for durability. But if you can get powder-coated smooth aluminum — specifically ATI's satin black — that's the best of all worlds: durable, cleanable, and it looks professional mile after mile.
