Buyers Products WideOpen Class 8 Step Boxes provide spacious, accessible storage for your semi truck. The lid of each box opens extra wide, allowing you to stow larger items and easily reach your tools and equipment. A universal design fits all major semi truck brands including Peterbilt-, Kenworth-, International-, Freightliner-, Western-Star-, Volvo-, and Mack-. The boxes feature .125 in. thick aluminum construction to handle life on the open road. The design is heavy duty but light weight, making the boxes extremely durable without adding a lot of weight to your tractor trailer. The hinge and hardware are constructed of corrosion-resistant stainless steel. An automotive bulb seal and locking, polished stainless steel T-handle latch keep your tools protected from theft. Replaceable grip strut steps provide superior traction in inclement weather and can be swapped out as they wear down.