The spline drive lug socket essentially acts as a "functional key" as well as adapter to be able to put them on and take them off. All 20 in the set would be the same. Yes, I know, they also make "key" lug nuts, where you have 4 that are the normal type, and one that also requires the "key" to be able to get it off. I'm using these to secure my Fikse wheels onto my WRX, and I figure for most intents and purposes, the fact that you have to use their special adapter to take the lug nuts off, will deter most wheel stealing thieves. Of course, having a locking nut is certainly an additional layer of security. I just didn't do them because I wanted all 5 of my lug nuts (at each wheel) to look the same. I'm using the blue tipped ones, which are a fun match to my WR Blue Pearl WRX. I really like the McGard SplineDrive lug nuts.