This track is extruded from high-grade 6061-T6 aluminum and hardcoat-anodized for a hard, long-lasting surface. 3807 track mounts to mast using a unique slug system that allows mast-up installation. Battcars let you raise, lower, and reef at any wind angle while enjoying efficient sail shape underway. Batten Traveler Systems replace conventional sail slugs with ball bearing traveler cars to handle the compression loads from full-length battens. The main becomes easier to hoist and lower, and won't damage the sail track. Add a lazy jack system, and raising or lowering your mainsail becomes a single person operation. Battcar systems also improve sailing performance, because they do not require the sail to be cut flat, or reduce the size of the roach, as with other systems like in-mast or in-boom furling. They make mainsail handling safer, by allowing you to raise or lower the sail with practically no effort at all, even with the sail powered up. Each system consists of four basic components: The track can be installed with the mast in place. Your mainsail will need to be modified for your headboard, short luff cars and inboard batten fittings by your sailmaker. Choosing the Right Battcar System Harken Battcar Catalog Section Which Battcar System? Intermediate Car Chart