Lisam 5 Pcs U Shape Silicone Anti Vibration Rubber Locking Plug for gopro Hero 1, Hero 2, Hero 3, Hero 3+, Hero 3 +, Hero 4 Camera - Black Suitable for gopro Hero 1, Hero 2, Hero 3, Hero 3+, Hero 4 Camera. Can be inserted in between the arm ends of the quick release buckle;Keep vibration down so that the camera will not rattle The looped end of the plug can be attached to the thumbscrew to keep it secure when not locked into place Having the rubber plug inserted prevents any accidental release of the quick release buckle, and also tightens up the fit Packaged included: Rubber Locking Plug x 5