The Yakima Bow Stern Tie Down safely secures the bow or stern of any boat with an easy-to-use ratcheting system. The hooks are zinc-coated stainless steel. The rope is made of nylon. Rocking and Rolling in the water is a good thing. Having your boat Rock and Roll while your on the highway heading to the lake is a very bad thing. Keep it all under control tie it down with the Yakima Bow Stern Tie Down.