The Rhino Rack 570 Series CanoeKayak Carrier gives you an efficient and easy hauling solution for one kayak or canoe. Choose the side loading carrier 570 if you plan on towing a trailer or carrying other gear behind your vehicle this solution gives you ultra quick and easy loading and unloading from your vehicle's side. The back loading 571 carrier offers easy hauling with its spring loaded rear pads that help you load and unload your boat by yourself. Both of these carriers offer universal fit with most roof rack crossbars. The pads themselves feature boat cushioning santoprene rubber and offer 180 degree rotation for easier loading. In addition, they conform to a wide variety of boat hulls with their large contact area of 2. 95 x 7. 87 inches size of front pads only on rear loading carrier. The included stainless steel hardware resists corrosion, and the pads are UV protected, waterproof, and mold resistant. Both of these canoekayak carriers include four cradles two front, two rear, two tie down straps 18 feet long, two padded tie down straps 9. 8 feet long, a security allen key, and a set of mounting instructions.