These wheel lug studs are made of carbon steel and tested to demanding automotive industry standards to ensure strength, longevity and safety. 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 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: 2.1 lb Package Quantity: 1 UPC: 019495609339 Color: Silver Head Diameter: 0.813 in Material: Steel Package Contents: 10 Studs Quick-Start Nose: No SAE or Metric: SAE Shoulder Length (In): 1.125 in Splined Bore Diameter: 0.625 IN Style: Serrated Stud Thread Diameter: 0.5625 IN Thread Direction: Counterclockwise (Left) Thread Length (In): 1.688 in Thread Size: 9/16-18 in Threads Per Inch: 18 Under Head Length: 2.781 in Country of Origin: US