Harken 57mm Carbo Blocks

The high-load 57 mm Carbo has a broad working range. Use for main and jib sheets on centerboard and keelboats like Lightnings, Dragons, Solings, and J/24s, and for mainsheet systems on catamarans.

The nylon resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio.  Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for maximum protection.  Blocks feature Cam-Lock or U-Lock locking systems to lock the shackle in front or side positions, or swivel to keep line from twisting.

Use for:

• Main/jib sheets

• Mainsheet fine-tune

• Control lines

• Vangs

• Cunninghams

• Outhauls