Yakima Hully Rollers Easy loading and unloading with U-shaped rollers mounted on pivoting bases that fit many kayak and canoe hull shapes Dynaflex padded rollers protect and grip your hull, then lock into place once loaded Comes with two rollers per package, Heavy-Duty Strap with coated metal buckles and one Bow/Stern Tie-Down, to complete the system pair with the Yakima HullHound or Mako Kayak Saddles Fits factory or aerodynamic crossbars with the use of Yakima Mighty Mounts (sold separately) Love it 'Till You Leave It Limited Lifetime Warranty.