TruRyde 4,400 lbs. Left Hand 10" x 2.25" Electric Trailer Brake Assembly. For Lippert trailer axles only. Will not work on Dexter axles. Comes with mounting bolts, nuts, and lock washers. Please note: This products mounting bolts are only designed to work with 4,400 lbs. axles. They will not mount to any other capacity of axle. TruRyde parts are manufactured to automotive standard in ISO/TS-16949 registered factory. Backing plates are CSA compliant. SAE rated friction material. Magnets tested 100% for pull force and conductivity. Will not work on 3,500 lbs. axles.