Racks clamp to the bed rails on pick up trucks. Clamps are padded and don't mar your paint. Easily removable when you don't need the racks. Includes two round rails and Yakima kayak roller/saddles to make kayak loading easy. Great for heavy sea kayaks. Rack bars are 29" high. Before buying make sure that this is high enough to clear your roof! I used these on a Dodge Dakota. Great deal-$100. PM if interested.