Raymond wrote:To ToolyMcGee
Just to provide clear info about the Master No.21. It is a rekeyable laminated lock. You can insert either a five or four pin cylinder in an assortment of keyways. The little one that uses the M2 blank is the No. 7. The No.7 is often hard to pick just because it is so small and most of the normal tools are too large. FYI
Oh, how could I have been so woefully inaccurate. The W27 cylinder, the five pin cylinder I was referring to, is almost two thousandths of an inch wider than the W2 cylinder. W27 uses a K27 blank, and W2 uses a K2 blank. K1 is M1 and K2 is M3. K7 is M2. You see? So, I was mistaken. Surely I wasn't suggesting a K7 key blank could be used in place of a possible K27. Thank you for correcting my grave error instead of fielding the question of our young friend here. I'm sure he appreciates it as much as a solution to his problem. There is probably a grammar error or two in this reply. Correcting it would really fix my wagon.
If you were trying to be helpful to me then I apologize and thank you. However it sounds like a cheap shot. I own a wheel barrow full of laminated Master locks and I certainly know the difference between a No 7 and a larger model. Just because I don't check the tech manual for every newb question doesn't mean I don't know where to find the file.
FYI I find them all easy to pick.
-Tooly