You are buying twelve (12) NEW fasteners. They are nylon push in moulding clips that are used on various years and models of Buick, Cadillac, Chevrolet, Oldsmobile and Pontiac cars and trucks that have 5/8" to 3/4" wide  mouldings. These fasteners have a 9/16" wide x 15/16" long plate and push into a 5/16" diameter hole.  Contact us if you have any questions.