These wheel lug studs are made of carbon steel and tested to demanding automotive industry standards to ensure strength, longevity and safety. 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 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 Package Dimensions: 3.62 x 2.36 x 2.19 inches Package Weight: 1.35 lb Package Quantity: 1 UPC: 019495608035 Color: Silver Material: Steel Package Contents: 10 Studs Quick-Start Nose: No SAE or Metric: SAE Shoulder Length (In): 0.563 in Splined Bore Diameter: 0.673 IN Style: Serrated Stud Thread Diameter: 0.5 IN Thread Direction: Clockwise (Right) Thread Size: 1/2-20 Threads Per Inch: 20 Under Head Length: 1.594 in Country of Origin: US