The Dorman 3/4" Round Fine Carbon Steel Wheel Lug Stud is designed to meet SAE automotive industry standards for durability and strength. It undergoes industry-standard proof-load testing to ensure it can withstand the toughest conditions. The carbon steel materials are also tested with a 72-hour salt spray to simulate three years of corrosion resistance. The black finish provides additional corrosion resistance. FleetPride is your First Click in Heavy Duty®.