Hex jaw design gives multi-sidesd , secure grip on all hex nuts , square nuts, unions ,and valve packing nuts , Hex jaw design gives multi-sidesd , secure grip on all hex nuts ,square nuts, unions ,and valve packing nuts ,The extra-wide opening offset model is ideal for securing drain Mobile jaws drop-forged with Crv steel ,ductile cast iron handle Size: 9-1/2"12-1/2" Hex Wrench