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 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 Durable material - carbon steel meets SAE automotive industry standards for strength and hardness Package Dimensions: 5.5 x 4.0 x 2.3 inches Package Weight: 3.34 lb Package Quantity: 1 UPC: 019495608943 Color: Silver Head Diameter: 1.11 in Material: Steel Package Contents: 10 Studs Quick-Start Nose: No SAE or Metric: SAE Shoulder Diameter: 0.625 IN Shoulder Length (In): 1.313 in Shoulder Thickness: 0.83 IN Splined Bore Diameter: 0.621 IN Style: Serrated Stud Thread Diameter: 0.5625 IN Thread Direction: Clockwise (Right) Thread Length (In): 2.04 in Thread Size: 9/16-18 in Threads Per Inch: 18 Under Head Length: 3.531 in Country of Origin: US