Abstract: In a clutch for coupling two shaft sections (2a, 2b) of a drive shaft, in which the shaft sections (2a, b) support an inner clutch ring (8) and an outer clutch ring (9) coplanar thereto and in which the clutch rings (8, 9) are provided with notches (19) which complement one another to bores (20) into which the hydraulically movable clutch bolts (22), fastened to a common servopiston (23), can be inserted. High operational safety and high user friendliness are achieved in that on the side of the clutch rings (8, 9) opposite the clutch bolts (22) a support ring (26) bridging their spacing (21) is arranged from which tie rods (27), supporting a locking ring (28) correlated with the clutch bolts (22), project that are arranged offset relative to the clutch bolts (22) and can be extended by a second servopiston (33). The two servopistons (23, 33) are arranged in a housing (11) connected to one shaft section (2a) and engaged from behind by the locking ring (28).