The RAP-B-400-GOP1U consists of the small Tough-Claw™ base double socket arm and B size 1" diameter ball with custom GoPro®/Action Camera adapter. The RAM Tough-Claw™ is the perfect mounting base for quick and easy tool-less installation and removal on round square odd shaped rails and bars. The Tough-Claw™ can be clamped on rails from 0.625" - 1.5" outer diameter. The GoPro®/Action Camera adapter attaches directly to the under-side of the camera replacing the factory mounting bracket.