Crozing Ring – A ring designed to fit around the end of the barrel and only used during the crozing operation. The outside surface of the ring must be smooth to allow skate board wheels to ride on it. The outside of the ring guides the cutting of the croze. In addition, four adjustment screws are used to center the barrel in the ring. The ring should project about ¼ inch beyond the end of the barrel. The screws are positioned to avoid the skate board wheels.