RAM Mount X-Grip Large Phone Mount w/Brake/Clutch Reservoir Base [RAM-B-174-UN10]X Grip Large Phone Mount with Brake Clutch Reservoir Base The RAM B 174 UN10 consists of hardware for mounting to either brake clutch reservoirs and rails that are 0. 5" to 1. 25" in diameter, double socket arm and universal X Grip large phone phablet holder. Designed into the mount is a 1" diameter patented rubber ball and socket system with adjustment points at both ends of the socket arm; this with a twist of the arm knob, allows you to move the X