Universal key (1), in particular for switchgear cabinets and shut-off systems comprising a base member (2), on which at least one key arm (3, 3a, 3b, 3c, 3d) is arranged, wherein at least at one end of a key arm (3, 3a, 3b, 3c, 3d) an actuating device (4) for actuating a device, in particular a closed - and / or blocking device is arranged, characterized in that the actuating device (4) a first key element (5) and a second key element (6) comprises the first and second key element (5, 6) with respect to the key measure differ insofar as the first key element (5) is smaller than the second key element (6), that the first key element (5) in a cavity (7) of the second key element (6) can be arranged, and that the first key element (5) and / or the second key element (6) relative to one another along a direction (r), the essentially by the key arm (3, 3a, 3b, 3c, 3d) is fixed, are movable.
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