Durable material - carbon steel meets SAE automotive industry standards for strength and hardness Corrosion tested - 72-hour salt spray testing simulates three years of corrosion resistance Tensile tested - lug studs undergo industry-standard proof-load testing to ensure strength Trustworthy quality - backed by team of professional engineers and quality control specialists in the United States Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool