The RAM-B-400-A-GOP1U consists of the Tough-Claw™ rail clamp base, SHORT length double socket arm and action camera mount. 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" - 1.14" outer diameter. The GoPro / Action Camera Mount attaches directly to the underside of the camera, replacing the factory mounting bracket.