Uses: ILCA outhaul and downhaul solutions as it is lightweight, strong and the larger sheave size makes it incredibly free running. This is the largest class-legal size for these applications. Opti Blackgold Mast Halyard. Useds with Halyard Line and a Hook-in block - the whole system only weighs 28 grams. Traveler controls, mainsheets and vangs, cascades, bridles, and other systems where small, lightweight blocks are called for. The high-strength composite T2ÃƒÂ¢Ã¢â‚¬Å¾Ã‚Â¢ is the first block with no metal shackles or rivets. The T2 can be tied, spliced, or lashed to almost anything. A length of SpectraÃƒâ€šÃ‚Â® line is included.