Originally Posted by
ScottCommutes
I don't think I have ever used a 12mm in my life. I would much rather have the 9, 11, or 15mm. It just seems that somebody that knows how to make a wrench set could do a better job of putting together a set - especially because they are double ended.
Well I don't know what you've worked on but I've used a 12 LOTS of times. 8-10-12-13-14 are very common in automotive work 15 as well I've probably never used an 11 and 9 is rare. 8 is GM side post battery terminals.