The Scotty 4579 Super Spanner and Gas Wrench is a durable, light weight wrench used to tighten and loosen larger size fire hose couplers. Designed for use on swivel hose fittings and anvil lug couplers ranging from 3" (76mm) up to 7" (178mm) hose lines and most Stortz fittings. The 4579 Wrench can also be used to operate standard 1.5" and 1.25" pentagon fire hydrant nuts. The tool will also open standard 70mm caps on 5 gallon foam concentrate pails and the large and small threaded plugs on 55 gallon drums. In addition there are two different sized slots incorporated into the wrench handle for use as a gas cock shut off. The wrench is spark and corrosion proof and includes a quick snap belt clip and comes in Hi-Viz yellow.