The Hullraiser Aero fits onto your aerodynamic factory crossbars without a struggle or any extra parts and the J-Shaped cradles make it the perfect transport system for your kayak (In fact, when it comes to carrying kayaks, there is no letter of the alphabet that can hold a candle to the letter J). Use the Hullraiser Aero for rec, touring and whitewater boats for safe and sound transport. The J-Cradle design uses less crossbar space than saddle designs and is compatible with round, square, and most factory crossbars right out of the box. Includes 1 pair of Heavy Duty Straps with padded buckles and 1 pair of Bow/Stern Tie Downs for super safe transport. Contains 1 pair of cradles for 1 kayak. Don't have factory racks? Check out the Hullraiser by Yakima.