The Tylaska mainsail halyard (headboard) shackles have the highest
strength-to-weight ratio of any existing halyard shackles. They are made
of high strength, missile grade aluminum with a unique locking tab
to prevent the loss of the stainless cross-pin while the shackle is open.
The all-metal thimble allows for use as a 2-1 purchase without the wear or
melting that occurs with plastic molded thimbles. The clevis slot
size is made to fit standard sail headboards without adding unnecessary
Tylaska Mainsail Halyard Shackles
Three sizes of halyard shackles are
produced with break strengths of 5,000, 8,000, and 12,000 pounds.