RAM Mount Yoke Clamp Mount Double Socket Arm w/Diamond Base Adapter [RAM-B-121-238U]RAM Yoke Clamp Mount w Double Socket Arm & Diamond Base Adapter Part #: RAM B 121 238U Consists of a double socket arm, universal diamond base and yoke clamp base. The hole pattern found on the diamond base will connect to many RAM cradles, as well as third party cradles including mounts with the industry standard AMPS hole pattern. The clamp base will accommodate rails in diameter from 0. 625" to 1. 25". The 1" rubber ball is at a right angle to the