RAM Mounts Double Socket Arm The Ram-B-201U-A, Short length double socket arm, has a socket at both ends that accommodates B Size 1 balls and device holders. RAM's socket technology allows for almost infinite adjustment to achieve the perfect viewing angle. Features: A single spring inside the arm opens the end sockets allowing you to pivot the ball and socket connection Ball socket-to ball socket length is 2 Also available in 3 222-239 and 6 753-330 lengths