Mjollnir is its name... or Mjolnir... one means snow... the other lightning, which is which I am not sure, but lightning is the one to associate with the hammer.
People wore it to give them strength, for everyday activities, just as Thor was called on to help crop growth or to settle a dispute with a neighbor or something like that.
I want a necklace, but I can't find any good ones, they are all shit and made of wire thin sheet metal... it sucks...