These wheel lug studs are made of carbon steel and tested to demanding automotive industry standards to ensure strength, longevity and safety. 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 Corrosion resistant - extensive salt spray testing helps ensure years of durability against rust Tensile tested - lug studs undergo industry-standard proof-load testing to ensure strength Package Dimensions: 3.63 x 2.38 x 2.19 inches Package Weight: 0.95 lb Package Quantity: 1 UPC: 019495609957 Color: Silver Head Diameter: 20.07 mm Material: Steel Package Contents: 10 Studs Quick-Start Nose: No SAE or Metric: Metric Shoulder Length (In): 0.512 in Splined Bore Diameter: 13.055 MM Style: Serrated Stud Thread Diameter: 12 MM Thread Direction: Clockwise (Right) Thread Length (In): 23.482 mm Thread Pitch: 1.5 mm Thread Size: M12-1.50 Under Head Length: 37.59 mm Country of Origin: US