Perfect Fit: Direct fit for 1999-2016 F250 F350 F450 F550 Crew Cab Constructed of 4', 5' or 6' oval tubing with 4' wide injection molded polymer step pads Protects vehicle rocker panels from potential damage Steel construction with 30 degree factory style bends at each fully-welded dome end Bolt-on installation and mount kit included - no drilling required on most applications