Dee Zee Tool Box - Hardware Side Mount Boxes. Constructed of durable 20-gauge steel. Protected by wrinkle white NRT(TM) (No Rust Technology) rust inhibitor powder coat finish. Crown style lid with a full pan double-V stiffener for superior rigidity. Other features: lockable stainless steel paddle handles, dampened gas shocks, closed cell foam gasket, and self-adjusting strikers.