confidence

I was at Sears the other day replacing a broken extension when I saw these on the tool rack
http://www.sears.com/craftsman-3-pc-...0P#reviewsWrap
These would have been really useful a few weeks back when I had to get at some annoying GM engine bolts. So I pulled them out and took a look at them but found a problem. They aren't in metric bolt sizes...well not all of them. As someone pointed out in his review the 3/8th is a 14mm but the other 2 are standard sizes.
I was wondering if anyone else has seen a similar tool from a different manufacture and hopefully a set that came in all metric. Heck, I don't even own any standard wrenches...

pwebb0207

18 will work for 11/16th and 10 for 3/8th - make sure they're six point