In France
In France, The wrench is called "Guillemin wrench" (French: clef Guillemin, pronounced ), but the firefighters call it "tricoise wrench" (clef tricoise, ). The curved part applies on the ring, and the hooked part clutches a notch.
Big tricoise wrenches are placed in fire trucks, and are mainly used to fasten the big hoses, e.g. ∅110 mm hoses to feed the pumper tank from the hydrant (∅100 mm for the clutch). Small tricoise are made of brass and hang at the fire belts; they are used to fasten the small hoses, e.g. ∅70mm to ∅22mm hoses (∅65mm to ∅20mm clutches).
The shape is sometimes adapted so it can be used as a tool for other purposes; it is then called "polycoise wrench" or "Deschamps wrench". These tools are used to
- 12mm female triangle wrench: opening the gas and electricity standard boxes of EDF-GDF
- 15.6mm female triangle: opening the boxes of the fire hydrants;
- 5×5mm to 8×8mm square female wrenches: opening the doors without knob, the ventilation accesses and the closets containing firefighting equipment in some public locations;
- 12.5×12.5mm square female wrench: open the dry risers;
- screwdriver: opening the bathroom and toilet doors;
- unfastening nuts with the 13, 17 and 19mm six-point wrenches.
Read more about this topic: Hydrant Wrench
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