These wheel lug studs are made of carbon steel and tested to demanding automotive industry standards to ensure strength, longevity and safety. Tensile tested - lug studs undergo industry-standard proof-load testing to ensure strength 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 Package Dimensions: 3.62 x 2.36 x 2.19 inches Package Weight: 1.32 lb Package Quantity: 1 UPC: 019495610687 Color: Silver Head Diameter: 0.74 in Knurl Diameter (In): 0.627 in Material: Steel Package Contents: 10 Studs Quick-Start Nose: Yes SAE or Metric: SAE Shoulder Diameter: 0.528 IN Shoulder Length (In): 0.54 in Style: Serrated Stud Thread Diameter: 0.5 IN Thread Direction: Clockwise (Right) Thread Length (In): 1.21 in Thread Size: 1/2-20 Threads Per Inch: 20 Under Head Length: 1.969 in Country of Origin: US