When trailering your car use them in place of lug nuts. First remove one lug nut from each wheel, screw on the tie down lug nut and attach your ratchet strap. Made of superior strength steel and torqued to the same specifications as the standard lug nuts, 90 Ft Lbs. Works on all 5 stud pattern wheels. Sold as a set of four. *Note: For use with cars weighing 2000 lbs or less.