72 Diamond Plate Aluminum Full Size Top Mount Truck Tool BoxBuyers Products Diamond Tread Aluminum Topsider Truck Box mounts on top of the truck bed rails to save valuable storage space inside your truck bed. Each truck box is crafted with 0. 100 in. thick aluminum and dual, recessed drop doors. Your equipment is better protected from the weather and theft with a shielded locking, die cast, compression latch system. Box is built for long life with aircraft grade cable lanyards, watertight continuous hinges,