UWS Topsider Aluminum Two Door Toolbox helps to prevent sagging, leakage and minimizes denting. It mounts on top of truck bed side rails perfectly. This toolbox offers stainless steel T-lock brass lock system provides rust-free product life, one-hand access and 3 latch points for strength and security. The stainless steel aircraft cable supports allow lid to open 90 degree and withstand up to 1,000 pound load when in the open position.