Keys to locks

[Jeckel]

I was looking at bump keys to buy. my question is what do all this different keys open, for master there is the M1, M10, M11, M13, M19, M5. M1 I am assuming is the lowest grade of locks, so the blue lock they sell, .
Does ayone one know what opens this lock, see picture below , it is a master lock that I picked up at home depot, and has M15 at the bottom, It is made with boron carbide, which is used in tank armor, is almost as hard as a diamond, 9.3 on the mohs scale.

[raimundo]

Master locks come in about 7 or 8 common keyways/lengths, some are five pin, I think they even have a very large padlock with 6 pins, can anyone confirm that? I think the # 27 or #29 is the blank that fits the master US double ball locking laminated padlocks used by the military, and by fits, I mean a flat file can make it thin enough to fit. Its like the common blank, but thicker.

[MacGnG1]

there was a lot of talk when those locks came out. the master magnums i think.

from what was discussed it seems that the inner workings are the same as a regular master lock just more rugged and more durable.

[cppdungeon]

If you are looking for what blank goes to what lock, i would check masters website.

--Cpp