One Way Clutch Bearing HF,HFL,RC,RCB,MZ,B200,BB,CSK,DC,ZZ, ... is overriding clutch ( one way clutch), composed of the outer ring punched with the high quality steel sheet, plastic retainer, spring ... HFL 3030HFL 3030 HFL 3530HFL 3530 HF One Way Clutch Bearing