CSK10 One-Way Clutch Bearing - Sprag Freewheel BackstopCSK10 One way clutch Bearing 10mm x 30mm x 9mm The CSK series is a one way (clutch) ball bearing, One way Bearing Sprag Clutch Freewheel and also called as Backstops, The one way bearings are used in any application that requires one direction rotation, such as mining, hydraulic, textile, printing and washing machines, conveyor systems that carry products to a higher level should not be reversed because of gravity during any power shortage. CSK10