anti theft wheel nut
Those were specific to the vehicle and not some generic key. That old, I doubt even the dealer can help anymore. The only way to get them off without the right key is to have them reverse drilled out, then if the wheel covers fit properly you won't need the locks, but if they don't as a lot of do, then just find a normal bolt and put in the locks place to help keep the covers on. Or you could replace the entire set of wheels with something really nice and use a lug nut lock.
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