Everything you need to adapt your boom into a low friction, 8 to 1, on-the-fly outhaul system. The kit includes 2 cleats, double sail pulley, 11/64 inch pre-stretched line (1-12 ft, 2-5 ft lengths), two Ronstan pulley blocks, and 2 T-handles. Compatible with modern race booms that have three integrated outhaul pulleys. Fits both standard and reduced diameter boom arms.