The Shocker 2-5/16″ Chrome Hitch Ball is designed with a? 1-1/4″ diameter shank and includes lock washer and nut for easy bolt in installation. Built for heavy duty Tow. The 2″ hitch ball has a Tow capacity of 16,000 lbs & 1,600 lb tongue weight. It is designed to work with Shocker Air Receiver Hitches and Shocker Solid ball mounts.