The RAM RAM-109VS-4U consists of a single swing arm mount with 1.5" socket,
6" long straight swing arm that is mounted on a vertical surface base. The
connection between the swing arm and the base is a bolt pivot point. The open
socket end will accept mounting bases with a RAM 1.5" diameter ball, enabling
a versatile 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.