Andoer CNC Aluminium Flat Bottom Adapter Mount + Screw + Tool for Gopro Hero 1 2 3 3+ 4 Bottom Adapter Mount is suitable for GoPro HD HERO 1/HERO2/HERO3/HERO3+ /HERO 4 camcorders. Low profile design minimizes camera shake and mounts low and stable for best sports performance. Made of aluminium, more durable. Equip with spanner, screw.