The Yakima DryDock lets you carry canoes, kayaks and other long cargo securely over your truck's bed. Combine the DryDock with cab-top roof racks or the Outdoorsman300. The DryDock mounts to your 2" receiver hitch to provide a stable platform that holds the back end of your cargo load. It adjusts vertically, 56-70" in 2" increments, to match various roof heights. Match the DryDock with a standard roof rack and crossbar over the cab, or the Yakima Outdoorsman 300 (sold separately).2" receiver hitch insert, with included threaded hitch pin, and two included stabilizing straps provide solid Strength. Requires one Yakima crossbar (not included) 58" or greater. Compatible with any Yakima kayak or canoe roof rack component