CSK25P One-Way Bearing Sprag Freewheel Clutch - One inner Ring Key-wayCSK25P One Way Clutch Bearing with Keyway 25mm x 52mm x 20mm Sprag Freewheel with Shaft Lock The CSK25P is a compact one way clutch bearing designed to allow rotation in one direction while locking firmly in the opposite. Built with a keyway on the inner ring, this unit ensures secure torque transfer and is commonly used in backstopping, indexing, or overrunning setups in conveyors, pumps, and industrial drives. 1 clutch bearing per pack Size: 25mm ID