Putco Boss Locker side rails are engineered for strength and longevity. The rails themselves is constructed from 2.5" NeveRust stainless steel tubing, and the ends are constructed from solid die cast stainless steel with a tie down point, providing 500lbs of tie down strength. Easy, no-drill installation utilizes the truck bed's stake pockets, installing in minutes. Combine with the other Putco Boss accessories for your truck or SUV to really give your vehicle that "Boss" look.