Features: Fits 2" x 2" receivers. Patent Pending design is the first adjustable ball mount that can be raised or lowered with the trailer loaded on the ball.. Replaces the need for numerous ball mounts. Helps prevent sway and vehicle handles better. E-Z adjust feature allows the ball mount to be raised or lowered with any 7/8 inch wrench. Ball mount height is automatically retained by a patented spring clip feature. Adjustable from 7 3/4 inch drop to 6 1/4 inch rise.