These wheel lug studs are made of carbon steel and tested to demanding automotive industry standards to ensure strength, longevity and safety. Tensile tested - lug studs undergo industry-standard proof-load testing to ensure strength Corrosion resistant - extensive salt spray testing helps ensure years of durability against rust Trustworthy quality - backed by team of professional engineers and quality control specialists in the United States Durable material - carbon steel meets SAE automotive industry standards for strength and hardness Package Dimensions: 3.63 x 2.38 x 2.19 inches Package Weight: 1.15 lb Package Quantity: 1 UPC: 019495610656 Color: Silver Head Diameter: 19.43 mm Material: Steel Package Contents: 10 Studs Quick-Start Nose: Yes SAE or Metric: Metric Shoulder Diameter: 12.8 MM Shoulder Length (In): 13.97 mm Splined Bore Diameter: 13.46 MM Style: Serrated Stud Thread Diameter: 12 MM Thread Direction: Clockwise (Right) Thread Length (In): 35.56 mm Thread Pitch: 1.5 mm Thread Size: M12-1.50 Under Head Length: 2.028 in Country of Origin: US