The Yakima ChainStraps are replacement straps for the Yakima SwitchBlade Cradle, found on hitch bike racks and Yakima trunk bike racks including DoubleDown, SwingDaddy, FlipSide, HighLite, BigHorn, FullSwing, SlickRoc, BackSwing, KingPin, QuickBack, SuperJoe and KingJoe. They also work in place of the World Straps used on racks prior to 2004. Two Yakima ChainStraps included. ChainStrap stretches to secure bike to SwitchBlade Cradle. Durable rubber construction.