Packing list: 10pcs wheel studs. These are 2.125" under head length. Stock studs for your vehicle are 1.5" under head length. These are .625" longer. These are identical in every other way except for the length. These are often required when adding wheel spacers or with certain rims. ?Reference part numbers: 27777B, 98070, 610-157, 610157, SN1081, 97090, 06411268, 6411268, 0610157, 610157, D7250, 02028070, 2028070 Fits for Chevrolet Chevelle Blazer, Dodge Dart, Pontiac Ventura LeMans, Oldsmobile, Buick ?Head Diameter: .720 In. Knurl Diameter (In): 0.487 In. Shoulder Length (In): 0.188 In. Thread Diameter: 7/16 Threads Per Inch: 20 Under Head Length: 2.125 In. Thread Size: 7/16-20 Thread Length (In): 2.095 In. Thread Handling: Right Hand Thread Class 12.9 wheel studs; Comes with 1 year wa-rranty.