These wheel lug studs are made of carbon steel and tested to demanding automotive industry standards to ensure strength, longevity and safety. Corrosion resistant - extensive salt spray testing helps ensure years of durability against rust Durable material - carbon steel meets SAE automotive industry standards for strength and hardness 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 Package Dimensions: 3.62 x 2.36 x 2.19 inches Package Weight: 0.99 lb Package Quantity: 1 UPC: 019495104148 Bolt Grade: 10.9 Color: Silver Head Diameter: 17.78 mm Material: Steel Package Contents: 1 Stud Quick-Start Nose: No SAE or Metric: Metric Shoulder Length (In): 6.35 mm Splined Bore Diameter: 14.48 MM Style: Serrated Stud Thread Diameter: 12 MM Thread Direction: Clockwise (Right) Thread Length (In): 35.44 mm Thread Pitch: 1.5 mm Thread Size: M12-1.50 Under Head Length: 44.83 mm Country of Origin: US