RAM Vertical Swivel Mount with Socket Arm (RAM-D-162V-MC3) (sku 55170)OVERVIEW The RAM D 162V MC3 consists of a swing arm with open socket and vertical surface mounting base. There are two (2) pivoting points on the mount: one at the swing arm and base and one at the center of the open single socket. Each pivoting point allows a complete 360 degree rotation. The open socket will accommodate all RAM 2. 25" diameter ball component parts. BALL SOCKET SIZE D Size (2. 25") WEIGHT CAPACITY 6 lbs MATERIALS Marine grade