I have that exact set, plus some BGS and Craftsman spark plug sockets. The SK set is about the same quality as the Craftsmans. The rail it comes with is pretty much useless. I don't know why SK didn't go with a nice blow-molded case like they did with their cheaper impact swivel socket sets. In terms of overall fit and finish, the chrome is nice, the rubber inserts... not so much. The u-joint sockets flop around a lot, but that's not a big deal for me. To be honest and in retrospect, the SK set is overpriced (It should cost about half of where it's at,) but I got them using a gift card, so no big. If I were doing it all over again, I'd find a plug socket set with a nice blow-molded case and metrics.