J/24 Harken 57mm Single Swivel Carbo Ratchet BlockSheave dia. 2 1/4in - 57mm
Carbo ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. 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 Hardkote anodized for strength and corrosion resistance. Eight facets hold line securely. Free-rolling ball bearings, sheave and sideplates UV stabilized with black additive for maximum protection.
The 57mm switchable ratchet provide precise on/off control with accessible, easy-to-operate on/of switches on both sides of the block. The 57mm provides up to 10:1 holding power. Best for main/jib/spinnaker sheets, mainsheet fine-tune, traveler controls, genoa leads, foreguys.
Length 4 1/16in - 103mm
Weight w/shackle 3oz -85g
Max. line dia. 3/8in - 10mm
Shackle pin dia. 3/16in - 5mm
SWL 500lb - 227kg
Breaking strength 2000lb -907kg