Buyers Products Diamond Tread Aluminum Topsider Truck BoxProfessional grade box mounts on top of bed rails to provide easy access to tools and equpment without taking up space in the back of your truck. Contents stay safe and secure behind dual drop doors with beveled edges. The continuous stainless steel hinges and watertight gasket system keep weather and grime away from stored supplies. A locking, die cast compression latch system provides a tight seal and deters theft.