B&W Tow & Stow Tri-Ball Ball Mount adjusts from 5-1/2 inch rise to 5 inch drop. Pull the pin and the ball platform rotates to switch between 1-7/8, 2 and 2-5/16 inch chrome hitch balls. When not in use, the head assembly folds up and under the vehicle for storage leaving the rear of the vehicle uncluttered.