Switch cabinet wrench for all usual technical shut-off systems.1 wrench for 9 different applications.The body houses a 5 mm square suitable for aerating radiator valves and a ¼” bit holder including magnet.Square locking: 5, 6, 7-8, 9-10 mm, including 7-8 mm also magnet.Triangular locking: 7,8-9,10-11 mm.Two-way key: 3-5 mm.Half-moon locking: 6 mm.Zinc die-casted.Securing chain with snap-hook