Ensuring Expertise Built In™, the OTR Heavy Haul Brake Shoe Kit not only meets, but also exceeds, all FMVSS121 brake standard requirements for 23K pound axles (165 AL Factor). With deluxe braking power, this semi truck and trailer part can be used on a variety of heavy duty vehicles, such as single axle tractors and trailers, car haulers, container chassis, double trailers, flat bed trailers, and tandem axle tractor and trailers. It is the ideal match for both on- and off-highway driving. The replacement brake shoe kit also boasts extended wear life and minimal drum deterioration, which significantly reduces downtime and maintenance. FleetPride is your First Click in Heavy Duty®.