SportRack ABR512 Kayak Saddle Car-top kayak carrier keeps your boats secure Synthetic rubber pads and flexible saddles that conform to variety of hull shapes Four-inch universal U-bolts attach carrier to almost any factory or aftermarket crossbars up to 3.5 inches in diameter Heavy-duty tie-down straps with cam buckles and galvanized steel bumper hooks included Impressive combination of design, durability, and affordability