RAM® Chrome Double Socket Arm with Diamond Plate - Medium Arm 1.4" - 1.625" The round plates each have

The round plates each have the industry standard 4 hole AMPS hole pattern

STANDARD size double socket arm and 1" diameter ball with custom GoPro® Hero adapter

and features two integrated pogo pins that provide charging capabilities to the device

The RAM-B-138-GA48 consists of a double socket arm

5" diameter round plate with universal AMPS hole pattern with a removeable 1/4"-20 threaded post on one side and a strap clamp base for rails from 1" to 2

RAM® Chrome Double Socket Arm with Diamond Plate - Medium Arm 1.4" - 1.625" The round plates each haveThe RAM B 103 238CHU consists of a CHROME diamond base and double socket arm that will accept 1" ball bases. The diamond base measures 2. 43" x 1. 31" and contain two holes 1. 912" from center to center, positioned at both ends of the diamond 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.