The Joby Action Clamp with Locking Arm provides a simple way to mount your action camera to flat and round surfaces. The Action Clamp attaches to objects up to 2" in width, and provides a tightening screw for getting a firm, tight hold against that surface. The Locking Arm features two balls joints that can rotate 360° and pivot 180° from side to side. This allows you to quickly position your action camera and get the right angle and elevation for your shot. Attach your action camera to the Locking Arm via a 1/4"-20 screw, or use the included GoPro tripod mount when shooting with your GoPro camera.