http://www.mcmaster.com/ctlg/DisplCt...ip&ToolsetAct=
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Loosen and tighten rocker-lug and pin-lug fire hose couplings. Both fit couplings from 3/4" to 6" dia. They also have a 1 13/16" Lg. x 1/2" Ht. slot for turning gas valves.