Neewer  Thumbscrew/ Thumb Screw Set for Gopro HD Hero4 Hero3+ Hero3 Hero2 Hero 1 Camera - Aluminum Stainless Knob Bolt Nut Screw -Brown Fit gopro HD Hero 1 Hero 2 Hero 3 Hero 3+ and Hero 4 CNC Aluminum made One set include 1 long & 2 short screw