The RAM Double Socket Arm consists of a long double socket arm that has a socket at both ends, that accommodates 25.4mm B size ball bases, device holders, and adapters. Double ball and socket technology allows for near-infinite adjustability of your RAM mounting system. With an overall length 152.4mm and a socket-to-socket length of 134.87mm, this is the longest B size RAM® double socket arm size and adds more reach to your favorite mounting solution. The easy to adjust knob allows for near-infinite adjustability for your connected device. This RAM Double Socket Arm is made of powder-coated, marine-grade aluminium for durability and reliability in the most demanding environments.