Introducing Harken Fly™ Blocks—Strength without Mass

Harken high-load Fly blocks were developed specifically for use with high-tech line. Efficient, and with an incredible working load for their small size, Fly blocks give sailors the power they need and are perfect for use on foiling dinghies and sportboats and for vang cascades and backstay systems on Grand-Prix racers. Their weight savings alone promises an instant uptick in racing performance.

"The use of high-tech line with the current braid and cover technology allows Harken to design blocks with smaller sheaves," said Matt Schmidt, leader of the project. "Harken Fly blocks offer the same strength and efficiency as larger blocks, but come in a much smaller, low aero package."

18 mm - MWL 125 kg (275 lb)
The 18 mm features an integrated stainless steel inner race and rivet, stainless steel ball bearings and composite fiber-reinforced sideplates.

29 mm - MWL 350 kg (770 lb)
The 29 mm has a one-piece titanium outer race/sheave, stainless steel ball bearings and inner race, and composite fiber-reinforced sideplates.

Harken soft-attach Fly blocks are designed to provide strength without mass, providing sailors with big power in a low-aero package. Designed specifically for high-tech line, these efficient blocks have an incredible working load for their small size. Fly blocks are perfect for use on foiling dinghies and sportboats and for vang cascades and backstay systems on Grand-Prix racers.

29 mm blocks feature a one-piece titanium outer race/sheave, stainless steel ball bearings and inner race, and composite fiber-reinforced sideplates.

Lashing line not included.