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 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 Durable material - carbon steel meets SAE automotive industry standards for strength and hardness Package Dimensions: 3.63 x 2.38 x 2.19 inches Package Weight: 1.12 lb Package Quantity: 1 UPC: 019495608912 Color: Silver Head Diameter: 0.780 in Material: Steel Package Contents: 10 Studs Quick-Start Nose: No SAE or Metric: SAE Shoulder Diameter: 0.621 IN Shoulder Length (In): 0.313 in Shoulder Thickness: 0.2 IN Splined Bore Diameter: 0.621 IN Style: Serrated Stud Thread Diameter: 0.5 IN Thread Direction: Clockwise (Right) Thread Length (In): 1.01 in Thread Size: 1/2-20 Threads Per Inch: 20 Under Head Length: 1.5 in Country of Origin: US