Large 7-1/4″ x 13″ X 3-1/2″ platform offers a large pivot area for stability and travels 5-1/4″ fore and aft with 8 locking positions. Easy to install and remove with a separate lower mounting plate. Rotates 360°. The pivot handle rotates with the chair. 4″ x 5-5/8″ mounting pattern. Universal mounting pattern: 5″ x 5″ and 5″ x 12″.
