Constructed from robust aluminum alloy, it can support up to 441 lbs, providing a stable platform for drivers to enter and exit their vehicles. Constructed with reinforced 2 mm thick step plates and a 3 mm thick toolbox body, this 18" x 27.5" x 25.4" durable aluminum step toolbox provides a robust design that maintains stability and resists bending, capable of holding up to 441 lbs.