Body Armor 4x4 FD-4121 Black - Steel RockStep for 2002-2013 Ford Super Duty Crew Cab (Pair) The RockSteps combines the ruggedness of a rock slider with the convenience of the of functional step pads Constructed from 3/16 inch thick steel plate throughout Stich weld along the step area allows for mud and snow to drain away Bolt-on installation Dual process textured back powder coat finish