Bolt on plate to adapt 2021-2023 F150 rear brake calipers with integrated electric parking brake to Sterling Super Duty axle. Cut flat plate from .25 minimum. Inside standoff is 1in OD 5/8 ID and .750 length. Outside caliper standoff is optional. Sand brake pads down to .630 total height to fit the 1.18 thk 12.83 diam rotors. Bolt on with 5/8 hardware to axle and 16mm to caliper.