This thumb screw is not from Xiaomi originally but from King Ma who is a well known manufacture in China specialized in camera OEM spare parts for many brands.It is compatible with all Xiaomi Yi cameras and GoPro cameras accessories .The Aluminum Thumb Screw is designed to tighten and loosen your camera stronger and safely, which are precision machined for durable and long term use.They are anodized aluminum knob to replace the plastic factory made Gopro knob.Replace your bolt & nut assembly with this high-strength, super lightweight aluminum bolt nut screw for better shots.

Package Includes-

1 x Aluminum Thumbscrew 

1 x Stainless Steel Acorn Nut