HARKEN 75mm Ratchamatic Flip-Flop SB Block - Cam Cleat, 2689

Small Boat Flip-Flop blocks pivot around the line axis to keep the line close to the deck. Hinged construction allows a variety of lead angles.

Lightweight, machined 6061-T6 aluminum cheeks pivot on fiber-reinforced plastic chocks. Sheave runs exclusively on a ball-bearing system for fast trim and release under any load. Ball bearings, sheaves, and sideplates are UV-stabilized with carbon black for maximum protection.

Ratchamatic block versions roll freely in both directions under low loads and automatically engage a ratchet mechanism as loads increase, giving sailors a holding power of up to 15:1. The ratchet engagement can be adjusted to a higher or lower load depending on the sailor’s strength, sailing style, and system usage.

Reversible cam arms adjust and lock in a range of positions for crew accessibility and accommodation of changing lead angles.

Note: Special Order Only

• Hinged construction allows for various lead angles
• Aluminum hard coat-anodized side plates
• Ratchamatic blocks are hand and crew savers
• Allows a line to be eased instantly with control
• All 75 mm Ratchamatic blocks are also available with Power3 sheaves which offer holding power options suitable for a variety of wind conditions