The Dorman Round Carbon Steel Counterclockwise (Left) Wheel Lug Stud is designed to meet the highest standards of automotive industry durability. This wheel lug stud is made from carbon steel materials and undergoes industry-standard proof-load testing to ensure strength and reliability. It also undergoes 72-hour salt spray testing to simulate three years of corrosion resistance. The black oxide finish provides additional corrosion resistance. With its 1.278" head diameter, this wheel lug stud is sure to provide a secure fit. FleetPride is your First Click in Heavy Duty®.