The lock armature contains an inner rotating body (14) for connecting to a lock-operating organ (12) and which has a first coupling section (31) with an opening (27) plus an outer rotating body (18) for connecting a handle (19) and which has a second coupling section (33). On the side of the inner body is a coupling to lock the two sections together for authorised lock opening. The second coupling section can be inserted in rotatable fashion in the opening (27) and the coupling has a lever (48) moving in the radial direction to lock the two sections. The inner rotating body is a hollow shaft and the second rotating body is a shaft fitting inside it.
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