The RAM-109H-2B-B-LO11 consists of a 6″ long STRAIGHT swing arm mounted on a horizontal surface mounting base. At the free end of the mount swing arm is a C size 1.5″ ball.The connection between the swing arm and the base is a bolt pivot point, and the round plate and arm connection is the RAM ball and socket system. The bolt pivoting point allows a complete 360-degree rotation and the ball and socket system allows a 180-degree vertical pivot with a 360-degree rotation. Included is a short length C size double socket arm, also included is the RAM Lowrance adapter base includes a 1.5″ diameter rubber ball and inserts directly to the back of Lowrance Elite 5, Mark 5 and Hook 5 Fishfinders. The adapter serves as a quick release mechanism, allowing you to remove or transfer your Fishfinder in seconds.