These wheel lug studs are made of carbon steel and tested to demanding automotive industry standards to ensure strength, longevity and safety. Product Features:Durable material - carbon steel meets SAE automotive industry standards for strength and hardnessCorrosion tested - 72-hour salt spray testing simulates three years of corrosion resistanceTensile tested - lug studs undergo industry-standard proof-load testing to ensure strengthTrustworthy quality - backed by team of professional engineers and quality control specialists in the United States
