True 2:1
Sheaved Shackles

Using a high strength composite sleave bearing, Tylaska has created true 2-1 halyard shackles capable of handling the full rated load of the shackle. The size was made to fit standard sail headboards without adding any unnecessary weight. Strength was optimized by computer and then verified by numerous “make and break” destructive tests.  2-1 arrangement provides tighter halyard tension.