These Midrange Captive Bearing Traveler Cars have a stand-up toggle that holds the mainsheet block upright off the deck. The toggle attaches low inside the car, so mainsheet loads as much as 40 off-angle don't impede the ball bearings from rolling freely. The high-strength Torlon ball bearings run on machined, Hardkote-anodized, Teflon impregnated races for smooth trimming and easing. Proper choice of purchase allows easy adjustment of the car using a single line and no winch.These cars have a factory installed purchase configurations of 3:1 for traveler adjustment. You can increase the purchase on an existing car (up to a max. of 4:1) using the 27 mm Purchase Upgrade Kit (T27K). Use with 27 mm CB Track Available in standard and high-load versions to handle mainsheet loads on boats from 27 ft to 34 ft (8 to 10 m) Solid 6061-T aluminum body for light weight, strength, and durability Captive bearings for easy loading and maintenance Please call us if you have questions regarding gear selection for your boat