The Dorman M22 x 1.5 Metric Serrated Clockwise Carbon Steel Wheel Lug Stud is designed to meet the highest standards of quality and performance. This wheel lug stud is made from carbon steel materials that meet SAE automotive industry standards for durability and strength. It has undergone industry-standard proof-load testing to ensure its strength and has been subjected to a 72-hour salt spray test to simulate three years of corrosion resistance. The black oxide finish provides additional corrosion resistance. FleetPride is your First Click in Heavy Duty®.