1. Made of high quality material, durable and useful. 2. Help you to easily tighten and loosen screws between mount and camera, and a O-ring helps to prevent camera from abrasion. 3. Direct replacement for GoPro cameras, replace the plastic thumbscrew. 4. Long and short thumbscrew make your camera look cool and awesome. 5. Suitable for Gopro Hero 4 / 3+ / 3 / 2 / 1 camera.