Harken's Carbo Ratchet Blocks allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. The nylon-resin sideplates are densely packed with long glass fibers for a compact block with a high strength-to-weight ratio. Machined aluminum sheaves are Hard Lube-anodized for strength and corrosion resistance. Eight facets hold lines securely. Ball bearings, sheave, and sideplates are UV stabilized with carbon black for maximum protection.
The 57mm Ratchets provide up to a 10:1 holding power 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, foreguy and vangs.
The patented switch locks shackle in front or side positions, or lets block swivel to keep line from twisting.
|Sheave Diameter||2 1/4 in||57 mm|
|Max Line Diameter||3/8 in||10 mm|
|Max Working Load||1,500 lb||680 kg|
|Breaking Load||3,750 lb||1,700 kg|
|Shackle Pin Diameter||1/4 in||6 mm|
|Weight w/ Shackle||15.4 oz||435 g|
|Length||4 1/16 in||103 mm|
**Maximum working loads and breaking loads for blocks based on cam strengths