This high quality tool is by far the best way to remove the nut off the end of the camshafts on early 911 engines (through 1980 1/2). A 12-point socket fits precisely over the cam nut (46mm) while the cam holder fits through the center of the socket- ensuring no slippage, no more trashed nuts, and an easier torque of the nut. Black oxide steel/cast. Replaces BOTH factory tools P202 and P203.