When you raise the Extend2Fit Convertible’s headrest height, the harness straps alter automatically along with it—no dismantling and rethreading demanded. Just squeeze the lever at the highest with the seat and pull up or thrust down. Video: Michael Hession Very simple to install: When it relates to motor vehicle seats, https://flenzy.store/high-performance-adjustable-racing-seat-universal-fit-black-red-pvc-leather/