RAM MOUNTS (RAM-D-201U-E Long Double Socket Arm for 2.25" Ball Base Overall Length: 12.875-Inches Socket-To-Socket Length: 11.1875-Inches The RAM-D-201U-E, long double socket arm, has a socket at both ends that accommodates 2.25-Inches ball bases A single spring inside the arm opens the end sockets, allowing you to pivot the ball and socket connection This socket technology allows for almost infinite adjustment and perfect viewing angles.