Also called a "Lathe Dog," this part is attached to a piece of bar stock by means of a screw that goes through the side and the long point is placed into one of the slots in the faceplate. The part is located between the lathe centres (live or dead) and when the faceplate turns, the dog actually drives the piece to rotate it for cutting. It also acts as a universal joint when turning a part between centres when the headstock is rotated to a slight angle, allowing a tapered part to be cut.