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 Tensile tested - lug studs undergo industry-standard proof-load testing to ensure strength Trustworthy quality - backed by team of professional engineers and quality control specialists in the United States Package Dimensions: 3.63 x 2.38 x 2.19 inches Package Weight: 1.3 lb Package Quantity: 1 UPC: 019495610151 Color: Silver Head Diameter: 0.815 In Material: Steel Package Contents: 10 Studs Quick-Start Nose: No SAE or Metric: SAE Shoulder Length (In): 0.625 in Splined Bore Diameter: 0.643 IN Style: Serrated Stud Thread Diameter: 0.5 IN Thread Direction: Clockwise (Right) Thread Length (In): 0.932 in Thread Size: 1/2-20 Threads Per Inch: 20 Under Head Length: 1.65 in Country of Origin: US