The OTR 1.5” Cam / 28 Spline / 5.5” Automatic Slack Adjuster ensures Expertise Built In™, being made with high-performing, high-tolerance gears, splines, clutch, and surface mechanisms. This Haldex-style automatic slack adjuster has a low-maintenance design that is easy to install, maintains a uniform distance between the brake drum and lining, and maximizes the semi truck's service life. This lightweight, reliable automatic slack adjuster enhances brake performance and shortens stopping distance. The OTR automatic slack adjuster is a trouble-free solution that thrives in all operating conditions, including weather, sub-zero temperatures or desert heat. In addition, OTR is committed to thorough, in-house designed testing procedures that ensure the quality of each automatic slack adjuster. As a result, this heavy duty slack combines both high-quality and excellent value to meet the demands of the road. FleetPride is your First Click in Heavy Duty®.