IRWIN Record Hinged Pipe Vices are guaranteed against breakage with exceptional strength in load-bearing areas. The single V-jaw in the frame moves between two V-jaws in the base to hold even the smallest pipe sizes securely. The self-locking frame is reversible for right or left-hand operation. Replaceable steel jaws can be fitted to a bench or stand. Used for repetitive pipe work, the top jaw is held in position with a hook, which automatically engages when the vice is closed. SG ductile cast iron frame with steel handle screw and jaws.