Master Lock s stainless steel Class III ball mount features: Master Lock s One Tool Torque™ system Precision formed steel pin in the One Tool Torque™ ball mount makes installation easy when used with the One Tool Torque™ Hitch Ball (sold separately) The One Tool Torque™ hitch ball has a notch in its base, which aligns perfectly with the steel pin on the One Tool Torque™ ball mount, securing its position and allowing you to tighten without a second wrench Works in drop or rise position and is compatible with all standard balls Stainless steel 2 Drop, 3/4 Rise, 1 shank hole 5,000 lb. max trailer/500 lb. max tongue rating