Abstract: In a permutation lock, a closing bolt is secured within a bore in the lock housing. Setting wheels on the lock housing can be rotated to a position representing the combination of the lock for releasing the closing bolt. Each setting wheel consists of an inner ring and an outer ring which are interconnected for rotational movement as a unit. The setting wheels extend between stops on the housing. One of the stops is displaceable in the axial direction so that the outer rings can be displaced axially relative to the inner rings for changing the combination of the permutation lock.