The RAPB400GOP1U consists of the small Tough-Claw™ base, double socket arm and 1" diameter ball with custom GoPro^® Hero 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^® Hero adapter attaches directly to the under-side of the camera, replacing the factory mounting bracket.