This is an adjustable camera mount for a most FPV Cameras. The bolt pattern on the base is setup for a ZMR 250 quadcopter frame but can be adapted to just about any FPV application. This mount is great for FPV racing where you need aggressize camera angles. The mount uses a pivoting base to allow your camera angle to change. This mount fits cameras with a board dimention of 28x28mm or smaller. This is a perfect fit for the Runcam PZ0420M.