In France, the wrench is called "Guillemin wrench" (French: clef Guillemin, pronounced[kle gijəmέ]), but the firefighters call it "tricoise wrench" (clef tricoise,[kle trikwaz]). 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. Ø110 mm hoses to feed the pumper tank from the hydrant (Ø100 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. Ø70mm to Ø22mm hoses (Ø65mm to Ø20mm 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