Harken 57 mm Cheek Ratchamatic® Carbo Air® Block

The Carbo Ratchamatic® is a load-sensing ratchet block that rolls freely in both directions under low loads and automatically engages the ratchet as loads increase. Shifting between ratchet and light-air modes is seamless.


  • Breaking load (kg) 907
  • Fasteners (mm) M4
  • Length (mm) 83
  • Maximum line Ø (mm) 10
  • Maximum working load (kg) 227
  • Sheave Ø (mm) 57
  • Weight (g) 89

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