Designs with a locking rings, and the spring locking Pin is structurally strong, which is very to use and will not loosen during use These hitches Pin is super and is small enough to be accessible wherever and whenever you need pin is treated with excellent galvanizing process, the surfaces is smooth, not easy to rusts and corrode Make of Marine Grade Stainless Steel, very and resistant to Widely used in various Shipbuilding, ship outfitting kayaks, canoes, boats, dinghy trolleys trailer, Manufacturer: YanFengPro