The BulletProof 2-5/16" Threaded Ball features a 1" threaded shank that is 2" in length with a lock washer to keep it secured. It provides a connection point for your trailer coupler. Made from high-strength, heat-treated steel and features a chrome plating that provides enhanced corrosion resistance. The BulletProof Threaded Balls can be used on the or anything with a 1" hole. *PATENT PENDING