Hi all. Can someone describe what coupe locking wheel nuts should be like? My local scrapper has what he claims are a set but I'm dubious: They are four wheel bolts with a 26mm thread, and instead of hexagonal nut flats, they have grooves. There is what he calls a key which slots over/into the grooves and has the conventional hexagonal head. Is this right for the '99 coupe 20v wheels I'm getting? 