This is a durable wrench used to tighten/loosen threaded fire hose couplings or Storz couplings as well as operate 1.25" & 1.50" hydrant pentagons. It is made of incredibly tough, glass-filled nylon and is spark and corrosion proof. It also has slots to shut off gas valves, open vent/drain plugs on drums, open foam pails, and comes with a quick-snap clip for securing. A wall/cabinet mounting bracket is also available.