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 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 Durable material - carbon steel meets SAE automotive industry standards for strength and hardness Package Dimensions: 4.81 x 3.63 x 2.19 inches Package Weight: 1.81 lb Package Quantity: 1 UPC: 019495608820 Color: Silver Head Diameter: 0.810 in Material: Steel Package Contents: 10 Studs Quick-Start Nose: No SAE or Metric: SAE Shoulder Diameter: 0.622 IN Shoulder Length (In): 0.5 in Shoulder Thickness: 0.27 IN Splined Bore Diameter: 0.623 IN Style: Serrated Stud Thread Diameter: 0.5625 IN Thread Direction: Clockwise (Right) Thread Length (In): 1.61 in Thread Size: 9/16-18 in Threads Per Inch: 18 Under Head Length: 2.156 in Country of Origin: US