Harken 57mm Carbo Ratchet Block - Single Swivel

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The 57mm Carbo ratchet provides sailors with up to 10:1 additional holding power. Ratchets feature accessible and easy to operate on/off switches on both sides of the block. Machined Hardkote anodized aluminium sheaves have eight facets to hold the line securely.


  • Sheave: 57mm
  • Length: 103mm
  • Weight with shackle: 85g
  • Shackle pin: 5mm
  • Max line: 10mm
  • Safe working load: 227kg
  • Breaking strength: 907kg