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.
Fits for Chevrolet Chevelle Blazer, Dodge Dart, Pontiac Ventura LeMans, Oldsmobile, Buick