plunger chip for woodenworking cutting size(mm):S7*97 DF04013 plunger chip (pin punch)A punch is a hard metal rod with a shaped tip at one end and a blunt butt end at the other, which is usually struck by a hammer. Punches are used to drive objects, such as nails, or to form an impression of the tip on a work piece. DF04013 plunger chip for wood working