Minimize the "bump" while towing! Custom designed mounting kit utilizes inherently stronger square base rails for a tighter connection between the hitch and truck. Provides a stronger towing platform by using all base rail bolts to carry the weight on the truck frame. Bolts to existing holes in your truck frame, reinforcing the frame in a laminate fashion. Kits include base rails, custom designed mounting brackets, and mounting hardware. 1 per box.