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 Trustworthy quality - backed by team of professional engineers and quality control specialists in the United States Tensile tested - lug studs undergo industry-standard proof-load testing to ensure strength Package Dimensions: 3.62 x 2.36 x 2.19 inches Package Weight: 0.83 lb Package Quantity: 1 UPC: 019495609407 Color: Silver Head Diameter: 18.59 mm Material: Steel Package Contents: 10 Studs Quick-Start Nose: No SAE or Metric: Metric Shoulder Length (In): 10.008 mm Splined Bore Diameter: 13.005 MM Style: Serrated Stud Thread Diameter: 12 MM Thread Direction: Clockwise (Right) Thread Length (In): 21.210 mm Thread Pitch: 1.25 Thread Size: M12-1.25 Under Head Length: 1.26 in Country of Origin: US