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 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 Package Dimensions: 4.8 x 3.6 x 2.2 inches Package Weight: 4.1 lb Package Quantity: 1 UPC: 019495610038 Color: Silver Head Diameter: 0.858 in Material: Steel Package Contents: 10 Studs Quick-Start Nose: Yes SAE or Metric: SAE Shoulder Length (In): 0.938 in Splined Bore Diameter: 0.682 IN Style: Serrated Stud Thread Diameter: 0.5625 IN Thread Direction: Clockwise (Right) Thread Length (In): 2.123 in Thread Size: 9/16-18 in Threads Per Inch: 18 Under Head Length: 3.335 in Country of Origin: US