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 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 Package Dimensions: 3.62 x 2.36 x 2.19 inches Package Weight: 0.98 lb Package Quantity: 1 UPC: 019495610205 Color: Silver Head Diameter: 18.92 mm Material: Steel Package Contents: 10 Studs Quick-Start Nose: No SAE or Metric: Metric Shoulder Length (In): 0.551 in Splined Bore Diameter: 13.13 MM Style: Serrated Stud Thread Diameter: 12 MM Thread Direction: Clockwise (Right) Thread Length (In): 24.925 mm Thread Pitch: 1.25 Thread Size: M12-1.25 Under Head Length: 41.66 mm Country of Origin: US