"Deschamps" knitting key

Aluminum wrench used by many firefighters.
Made of non-sparking cupro-aluminium (brass type) material

Various functions are associated with this model: 

• Tightening fittings with nominal diameters from 20 mm to 100 mm

• Opening EDF-GDF boxes with the 12 mm female triangle

• Opening fire hydrant boxes with 15.6 mm female triangle

• Open handleless doors, ventilation ducts and fire cabinets with the 5×5 mm to 8×8 mm truncated pyramid square. Open bathroom and WC doors with the screwdriver

• Opening dry column outlets with 12.5 mm square socket

• Loosen nuts with three 13, 17 and 19 mm female hexagon bolts.