Ronstan Series 40 Ball Bearing Block - Fiddle - Becket - Cleat [RF40530]Series 40 Ball Bearing Block Fiddle Becket Cleat Features: Low friction Acetal or Torlon bearing system Lightweight Cheek cut outs for easy bearing maintenance Captive Lock universal head Slotted pin shackle eliminates fouled lines Snap fit removable becket pin Multi position cleat arm Low friction, 2 stage ball bearing system High static and dynamic load capacity Lightweight Cheek cut outs for easy bearing maintenance Sheaves running on Acetal or