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Harken 57mm Carbo Triple Ratchet Block with Becket and Cam for controlled easing of a 4:1 or 5:1 purchasing system
Assemblies secure to track
15-5 PH stainless steel offers high strength and hardness with excellent corrosion resistance
Fasteners sold separately
Flared cheeks prevent chafe on the halyards
HARKEN 51 mm Self-Contained Sheaves, 311 Sailboat Blocks & Hardware_40 mm Utility Cheek Block Harken 57mm Carbo Triple RatchetSelf contained sheaves are designed for sailors to use in custom applications. Big Boat and high load sheaves are available for special applications as well as for replacement sheaves in Big Boat blocks. Narrow high load sheaves in mastheads improve sail handling, and speed sail changes, and allow the use of smaller, lighter halyard winches. High load titanium V sheaves feature the same incredibly efficient bearing set of angled titanium rollers as
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