CLOVER U Shape Silicone Rubber Locking Plug 5 Pcs for GoPro Hero 1, Hero 2, Hero 3, Hero 3+, Hero 3 Plus, Hero 4-Black Compatible with GoPro Hero 1, Hero 2, Hero 3, Hero 3+ and Hero 4 cameras Can be inserted in between the arm ends of the quick release buckle; Special designed for some high speed applications like auto racing, as it can keep vibration down so that the camera will not rattle Having the rubber plug inserted prevents any accidental release of the quick release buckle, and also tightens up the fit The looped end of the plug can be attached to the thumbscrew to keep it secure when not locked into place Package included: - Rubber Locking Plug x 5(quick release buckle and screw are NOT included)