Do you currently own a late 1960's to early 1970's Corvette, Chevelle, Camaro, Monte Carlo, Nova or any other GM cars that has or "HAD" the 15x8 or 15x7 rally wheels that were equipped with the derby style center caps? If so, have you been or do you anticipate becoming a victim of "Midnight Auto Parts" only to discover your wheels tires, wheels and center caps grew legs and left your pride and joy sitting on blocks? If you answered to any or all questions, then I suggest you invest in a set of theft proof and bullet proof locking center caps and I am quite confident this will be the last set you will need to purchase. NOTE! these caps are "USED CAPS" that have been modified and machined to accept the factory GM locking kits that were used for the wire wheel covers and these caps still retain their original appearance. For more info contact me at 317-440-2652 by text only.Thank You