CSK15P One-Way Bearing with Key-way Sprag Freewheel Backstop ClutchCSK15P One Way Clutch Bearing with Keyway 15mm x 35mm x 11mm Sprag Freewheel with Inner Ring Lock The CSK15P is a one way sprag clutch bearing featuring a keyway on the inner ring for secure shaft connection. Designed to allow rotation in one direction only, its ideal for backstopping, indexing, and overrunning applications in machinery like conveyors, textile machines, and pumps. 1 one way clutch bearing per pack Size: 15mm ID x 35mm OD x 11mm width