HARKEN - 57 mm Ratchet Block Swivel, Red Sheave

Harken 57 mm Ratchet Block  Swivel, Red Sheave - 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 fibres for a compact block with a high strength to weight ratio. Machined aluminium sheaves are Hardkote anodised for strength and corrosion resistance. Eight facets hold the line securely. Free rolling ball bearings, sheave and sideplates UV stabilised with black additive for maximum protection. 

This 57mm switchable ratchet provides precise on/off control with accessible, easy to operate on/off switches on both sides of the block. 

Technical data:

• Sheave diameter - 57mm
• Length - 103mm
• Weight - 85g
• Shackle pin diameter - 10mm
• Max line diameter - 12mm
• Safe working load - 227kg
• Breaking strength - 907kg