This Backstop clutch is a kind of industrial machinery parts which can overrun freely in one direction of rotation. Reverse rotation is instantaneously prevented by the automatic engagement of the clutch (also called a One-way clutch or a Cam clutch).

BS-K Series : For the only backstopping application (High torque, Low speed)

MG-K, MI-K, MZ-K : For the backstopping, overrunning, indexing application (High speed, Heavy load)