Master Lock's Adjustable Height, Zero Tilt Ball Mount infinitely adjusts from 7-3/4" drop to 6–1/4" rise for level towing every time. The EZ adjust feature allows the ball mount to be raised or lowered with a 7/8" wrench, socket, or a 3/8" ratchet drive while the trailer is attached. The ball mount height is automatically retained by a patented spring clip and has a capacity of 5,000 lb trailer, 500 lb tongue. The hitch ball is not included.2841AT:  One Tool Torque Adjustable Height Ball MountA level trailer means safer towing. Trailer Tracks directly behind the vehicle. Helps prevent sway; improves handling. Meets V5, SAEJ684, CSA D 2–264, State of NY towing specifications.    »  Infinitely adjustable from 7–3/4" drop to 6–1/4" rise    »  EZ Adjust feature allows the ball mount to be raised or lowered with a 7/8" wrench    »  Ball mount height is retained by a patented spring clip feature    »  Accepts 1" diameter shank hitch balls    »  Capacity: 5,000 lb. trailer weight, 500 lb. tongue weight    »  Fits 2" x 2" receivers            »  Patented Design** Hitch Ball Not Included