Comes in a set of (2) two, left-hand side and right-hand side. Fits to the Ford Super Duty's existing mounting points. Foot rails follow the contours of the vehicle's roof line providing a sturdy base to fit the Front Runner Slimline II Roof Rack or Load Bars. Made of 3CR12 stainless steel and sealed with the same durable, weather resistant powder coating as the Front Runner Slimline II Roof Rack. Installation hardware and fitting instructions included. Drilling is required for installation.