Harken 57 mm Carbo Air Block Ratchet Block (2139)

Features:

• Precise on / off control
• Accessible and easy-to-operate on / off switches on both sides of the block
• Designed for use with :
  • Main / Jib sheets
  • Spinnaker sheets
  • Traveler controls
  • Foreguys

Specifications:

• Maximum Working Load: 600 lb (272 kg)
• Breaking load: 1500 lb (680 kg)
• Weight: 9oz (255g)
• Sheave diameter: 2-1/4" (57 mm)
• Maximum line size: 3/*" (10 mm)

Note: 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 57 mm provides up to 10:1 holding power