1.freewheel sprocket 2.Certificate ISO9001.2008, 3.Material: Bearing steel, 4.Various size and type Sprag Clutch BearingsSprag Clutch is a one- ... with very little backlash.Applications: Automatic transmissions, Helicopters, Motorcycle, Starters, Primary drive, Conveyors, Overrunning, Indexing, Backstopping, Hoist load brake. High quality freewheel sprocket of ...