"With the combined strength of a polyurethane mounting strap and durable injection molded parts, the TwistLock Beverage Locking System Bar Mount Cup Holder attaches to any round surface. From raft frames to roll cages and grab handles, you can work hard or play hard and feel confident that your beverage is secure, even during the most turbulent of activities. The TwistLock is easy to install with the included adjustable strap. It's just as easy to remove, so you can take it wherever you go. Sip, twist, go, and never spill your drink again! 2.7""L x 2.7""W x 1.1""H. Attaches to any round surface Strong polyurethane mounting strap Durable injection molded parts Easy to installView the TwistLock Warranty Information"