Irwin® Record® 182C Chain Pipe Vice 6-100mm (1/4-4in)IRWIN Record Chain Pipe Vice rests on a V formed by two sets of drop forged, heat treated replaceable steel jaws. The high tensile steel chain is then looped over the pipe, locked into a slot between the jaws and tensioned by a handle and screw to provide a strong rigid three point location which renders the pipe immoveable. Body castings are guaranteed against breakage. IRWIN Record 182C Chain Pipe Vice. Pipe Capacity: 6 100mm (1 4 4in).