Harken 57mm and 75mm Carbo Ratchet Blocks
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. Ball bearings, sheave, and sideplates are
UV-stabilized with carbon black for maximum protection.
The 57 mm and 75 mm
switchable ratchets provide precise on/off control with accessible,
easy-to-operate on/off switches on both sides of the block.
For the ultimate system, mount a switchable ratchet in the cockpit
and a boom-mounted Ratchamatic® directly above for double holding
power in heavy air and a free-running mainsheet when it’s light.
The 75 mm provides up to 15:1 holding power; the 57 mm 10:1.