For dockside safety and convenience, Taco Marine's fender lock ensures secure, quickly stored fender lines. Designed for simple single-hand operation, the fender lock ensures that lines remain at the optimum length with the mounting pin attached. At the dock, you simply insert the pin into the fitting, and your boat is protected with the fenders in their ideal position. Durable stainless steel construction. Limited three-year warranty. Includes a large .88" hole diameter to accommodate rope. 1-19/32" height above deck. 1/4" NPT drain plug.