This system is typcially used for monohull boats up to 37 feet in length with mainsail area under 350 square feet. The system can be used on multihull boats up to 30 feet in length with up to 275 square feet of sail area.

The one-piece solid aluminum consturction is lightweight and strong. The free-rolling ball bearing cars let you hoist and reef the main quickly on all points of the sail. Cars are easily removed from the track by freeing the screwpin endstop and sliding them off. Stainless steel wire guides keep the balls captive when teh car is off the track.