Had an old "multi-size" wrench I kept in my pouch. It was steel, about 6" OAL with a "skeletonized" handle, the jaws were smooth on one side, serrated on the other, and they fit various nuts from about 1/4" to 3/4". Had just found another that went from 1/2" to 1" before my stuff got ripped.
They were handy for holding connectors, tightening wire nuts and such.
