I think he used his magnetic powers to deflect the hammer not actually lift it.
KGK
kgkgVigilante
well there was a thor comic where magneto was actually moving the hammer(rite out of his hand).
mebee that's has changed now( it was a old comic).
SRA
srankmissingninVP of Comic Knowledge
Didn't someone with the power jem lift the hammer once with pure strength while not be worthy?
DEM
demigawdBoard Scientist
Magneto didn't physically lift the hammer. He snatched it from him with his powers. the spell only prevents someone from physically lifting it. Lots of people use their powers to lift it, or build machines to lift it. Robots can lift it too.