RAM Mount Twist Lock Suction Cup w/Round Base Adapter [RAM-B-166-202U]RAM Twist Lock Suction Cup with Double Socket Arm and Round Base Adapter The RAM B 166 202U consists of a double socket arm, 3. 25" suction cup twist lock base and round base adapter that contains the universal AMPs hole pattern. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles.