The Wooden Camera UVF v2 Extension Arm attaches to the UVF Mount v2 to extend the position of the viewfinder. Includes moving knuckle with NATO thumbscrew (identified by red component) for positioning on NATO rail and tension thumbscrew to adjust tilt of NATO rail. Tool-less design allows quick installation and removal. Safety pins prevent accidental removal. UVF v2 Extension Arm can attach directly to any NATO-style rail.