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Harken 57mm Ratchamatic Block w/ Swivel & 1.5x Grip

Item #


Product Description

Harken 57mm Ratchamatic Block w/ Swivel & 1.5x Grip

Power3 ratchet blocks provide sailors that race small one-designs with three holding-power options to handle a variety of wind and sea conditions. More choices allow sailors to fine-tune their set-ups in tandem with the purchase that provides the ideal level of power, responsiveness and grip.

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.

1.5x grip: breeze–on/puffs; 15:1 holding power.


  • Sheave Ø: 2 1/4 in (57 mm)

  • Length: 4 1/16 in (103 mm)

  • Weight: 3.7 oz (104 g)

  • Shackle pin Ø: 3/16 in (5 mm)

  • Maximum line Ø: 3/8 in (10 mm)

  • Maximum working load: 500 lb (227 kg)

  • Breaking load: 2000 lb (907 kg)

  • Holding power w/180 degree wrap 50 lb (23 kg): 15:1

    DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.