RAM Drill-Down Mount with Double Socket Arm with Action Camera Adapter (RAM-B-138-C-GOP1) (sku 51148)RAM Drill Down Mount with Double Socket Arm with Action Camera Adapter (RAM B 138 C GOP1) The RAM B 138 C GOP1 consists of a 2. 5" diameter round base with the universal AMPS hole pattern, LONG size double socket arm and 1" diameter ball with custom GoPro Hero adapter. 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