RAM® Double Socket Arm with Metal Knob - C Size Short RAM-109VS-4 The RAM-109-1ATU is a straight

The RAM-109-1ATU is a straight 6" long arm extension for the RAM 109 series

This marine drill down base is 3

The 3" bolt will allow the swing arm to connect to a RAM-109 base

The RAM-101U-ZE1 consists of a medium length double socket arm

RAM® Double Socket Arm with Metal Knob - C Size Short RAM-109VS-4 The RAM-109-1ATU is a straightThe RAM 201MU B, short double socket arm with metal knob, has a socket at both ends that accommodates 1. 5" 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.