Harken small boat furlers allow the sail to be set and furled from the cockpit, a critical convenience in many racing dinghies and trailerable sailboats. These systems, now sold as drum and swivel kits, are for roller furling, not for reefing. Constructed of Hardkote anodized Teflon-impregnated aluminum, they feature multiple stacked races of Delrin or Torlon ball bearings for smooth rotation under load. The jib's luff wire must be properly seized to the sail, since it carries most of the headstay load. You must supply the drum furling line in the diameters shown in the chart.
434 furler for dinghies under 16ft. (4.9m). Safe Working Load 500lb. (227kg)
435 furler for dinghies to 20ft. (6.1m) or catamarans to 18ft. (5.5m). Safe Working Load 950lb. (431kg)
436 furler for cruising boats to 25ft. (7.6m) or catamarans to 23ft. (7m). Safe Working Load 2000lb. (907kg.)