Harken 57mm Carbo Flip Flop Block with Cam

The Harken 57mm Carbo Flip Flop Block with Cam is designed for lightweight, low-friction line handling in compatible sail-control systems. Carbo blocks combine compact construction with high working-load capability, helping sailors trim and ease sheets or control lines efficiently without adding unnecessary hardware mass to the rig.

The specific swivel, becket, cam, ratchet, flip-flop, triple, or quad configuration determines how this block integrates into the purchase system. Carbo Ratchet versions add holding power for hand-held loaded lines, while Carbo Air designs emphasize free-running low-friction operation for responsive trimming.

Confirm sheave diameter, maximum line size, maximum working load, attachment method, lead angle, and the required purchase arrangement before installation. Never exceed Harken's published load limits. Inspect the block, attachment hardware, line, sheaves, and any cam or ratchet mechanism regularly, especially after heavy-weather or high-load sailing.

• Carbo construction supports smooth trimming and easing.
• The block gives high working capability without unnecessary bulk.
• Swivels, beckets, cams, ratchets, and multiple sheaves support specific line layouts.
• Ratchet or cam-equipped versions add holding or cleating capability where specified.

Compare with our other sailing hardware.