This pair of rails, with intergrated mounting feet, is used to mount the Front Runner Slimline II Roof Rack to the vehicle. Comes in a set of (2) two. Left-hand side and right-hand side. Easy installation, no drilling into the car's roof required. Does not use any additional tracks or feet which gives this setup a stock look. Made out of black powder coated 3CR12 corrosion resistant steel. Low wind noise. These Foot Rails contain 2 openings to access Front Runner under rack mount tables (1 smaller prep and 1 larger camp size table).