Z-WRENCH features extra wide jaws which spread the clamping force, enabling the tool to grip without marring the surface of the conduit. The V"" shaped upper jaw allows Z-WRENCH to accommodate a wide range of conduit sizes. Shallow grooves in the upper and lower jaws provide an excellent grip. JPZ 1: 1/2"" thru 1-1/4"" JPZ 2 : 1-1/2"" thru 2-1/2"""