Buyers Products Topsider Truck Boxes are engineered for maximum durability and convenient access, utilizing a heavy-duty diamond plate aluminum body with a recessed drop-door that is secured by aircraft-grade cables. These boxes feature a die-cast T-handle compression latch system that provides a tight weather seal against a thick rain gutter to keep tools dry and protected from the elements. Designed to mount directly onto the side rails, they offer a secure storage solution that leaves the truck bed floor completely open for larger equipment and materials.