Our crossbar kit comes complete with four mounting brackets which attach to the sides of any 4”H Garvin Wilderness Rack. The kit also includes two Yakima compatible crossbars that are 58”L and 1 1/8” diameter. With this kit installed you can attach any of the Yakima mounts they offer including bike, ski, kayak among others. The clamps are adjustable along the side of the rack to accommodate whatever you are mounting to the rack. This kit is also great for attaching a roof top tent. The kit includes all mounting hardware and is powder coated for durability.