"This Better Built SEC series side-mount truck box is a solid, one-piece diamond treadplate aluminum truck box. Two-stage locking pull-handle rotary latches offer premium security and protection for its contents. 48in.L x 11 1/2in.W x 11in.H. Body Finish Treadplate, Body Material Aluminum, Lock Included Yes, Dimensions L x W x H in. 48 x 11 1/2 x 11, Gas Struts 2. 100 fully welded seams and premium weather-resistant seals lock out the elements Reinforced foam-filled lid Continuous aluminum piano hinge 2 auto-lift self-rising shocks for easy single-handed entry Solid one-piece body construction Adjustable strikers"