Harken 57mm Carbo Ratchet Block

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Carbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. Nylon resin side plates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio.

Machined aluminum sheaves are Hardkote anodized for strength and corrosion resistance.

Eight facets hold line securely.

Ball bearings, sheave and side plates are UV-stabilized with carbon black for maximum protection.

The 57mm switchable ratchets provide precise on/off control with accessible, easy-to-operate on/off switches on both sides of the block.

Use for:

Main /jib / spinnaker sheets,

Mainsheet fine-tune,

Traveler controls,

Genoa leads,



Sheave dia: 57 mm

Length: 103 mm

Weight*: 85 g

Shackle pin dia.: 5 mm

Max line: 10 mm

Max working load: 227 kg

Breaking load: 907 kg

* Weight with shackle

**Includes RH fasteners and mounting pad.

***Maximum working loads and breaking loads for blocks based on cam strengths.

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