Harken 57mm Ratchet Block – Swivel – Ideal for Dinghy Mainsheets
Carbo ratchet blocks allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. The switchable Harken 57mm Ratchet Block provides precise on/off control with accessible, easy-to-operate switches on both sides of the block.
Nylon resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio. Machined aluminum sheaves come hardcoat anodized for strength and corrosion resistance. Eight facets hold the line securely. Ball bearings, sheave and sideplates also UV-stabilized.
- Sheave Ø: 57mm / 2 1/4in
- Maximum line Ø: 10mm / 3/8in
- Maximum working load: 227kg / 500lb
- Breaking Load: 907kg / 2,000lb
- Weight: 85g / 3oz
- Shackle pin Ø: 5mm / 3/16in
Harken Carbo Air blocks are made of tough reinforced composite in a size and style to fit any system: singles, doubles, triples, quads & quints; ratchets and also fiddles. As well as soft and hard attach. They have very high working loads for safe, easy trimming and are lightweight, strong, reliable and affordable.