Yakima HullHound Premium Boat Saddles - Pack of 2 Comes with two saddles per package; To complete the system add HullyRollers or another pair of Hellhound saddles Tool-free install to round, square, factory or aerodynamic bars with universal attachment - includes anti-rotation adapter for round bars Spring-loaded base automatically adjusts when loading and minimizes rattling when empty Wing-shaped surface with smooth over-molded pad hugs and protects both flat and steep hull types Includes heavy duty straps and bow/stern tie-downs Comes with two saddles per package; To complete the system add HullyRollers or another pair of Hullhound saddles Tool-free install to round, square, factory or aerodynamic bars with universal attachment - includes anti-rotation adapter for round bars Spring-loaded base automatically adjusts when loading and minimizes rattling when empty Wing-shaped surface with smooth over-molded pad hugs and protects both flat and steep hull types Includes heavy duty straps and bow/stern tie-downs