Hex jaw design gives multi-sided, secure grip on all hex nuts, square nuts, unions and valve packing nuts.Hex jaw design gives multi-sided, secure grip on all hex nuts, square nuts, unions and valve packing nuts. The extra-wide opening offset model is ideal for securing drain nuts on sinks and tubs. Thin, smooth jaws slip into the tightest places. 1 1/8 - 2 5/8 Inch Pipe Capacity