So I got this 12 piece metric deep impact socket set back in February,and have used a few select sockets but never the 17mm.Today I reached for the 17mm and noticed something a little odd.It was a 11/16 stamped impact socket with the 11/16 part number,but had the 17 in yellow.So,I checked the others on the rail,but they were all correct.Just thought I'd share. I now have a 17mm impact socket on the way in the mail...