Furlex, the world's top selling furling system has many features including: A unique, patented load distributor in the halyard swivel to make reefing easier. Exposed SS 2343 bearings and races for strength, and durability. Tack swivel to help improve sail shape when reefed. Twin groove, aerodynamic extrusion for racing and offshore cruising. Full length bearings in each extrusion, no contact between the aluminum components and the SS forestay. Split drum for racing All SS lower bearing swivel ( 200S-500S) Optional integral turnbuckle available.(200S-500S). Designed as a do-it-yourself kit, every Furlex system comes complete with: SS 2343, 1x19 forestay wire, pre swaged on the upper end. Sta-Lok terminal for the lower end. Four stanchion blocks. Furling line. SS snap shackles for halyard and tack swivels. Pre-feeder. Two halyard guides with drill bit, screws, loctite, and backing plate. Grease. Torx key set. Comprehensive and easy to follow manual and parts list. Five year, worldwide guarantee.