"Convert-A-Ball Hitch System is your answer to multi-need trailer connections. No more wrenches, no more busted knuckles. Interchangeable nickel plated balls fit on 1 inch shank. U.S.A. Plated Nickel, Max. Gross Trailer Weight lbs. 10,000, Ball Diameter in. 1 7/8, 2, 2 5/16, Shank Diameter in. 1, Includes qty. 3. Beats the national standard SAE-J684-E for ball hitches. V-5 rated safe Safety hole drilled for cotter pin Stainless steel slide pin with shear strength of 21,000 lbs."