Abstract: A clutch which is used to couple and drive a pair of co-axial shafts or other rotating members and which is made to release at a desired torque level. The clutch permits the driving member to make a single revolution before there is any torque tending to rotate the driven member. The drive position is an indexed position, and the breakaway torque is controlled by a pair of permanent magnets. After release, a cam is under spring load from a cam divider which tends to rotate the two members of the clutch relative to each other to the reset position. The cam action creates a torque independently of the drive to reset the clutch. Further, the indexing of the clutch to its drive position each time it releases is positive in the present device.