Thor is a god of thunder, son of Odin and a member of the Aesir sub-group of the Norse gods. Thor's wife is Sif. He smashed giants' heads with his mighty throwing hammer, Mjolnir. Thor is often compared with the Greek thunder god Zeus. The English fifth day of the week is named Thursday after Thor (Thor's Day).
Thor posseses 3 important objects:
"The first is a hammer, which both the Frost and the Mountain giants know to their cost, when they see it hurled against them in the air, for it has split many a skull of their fathers and kindred. When thrown, it returns to his hand of its own accord. The second rare thing he possesses is called the belt of strength. When he girds it about him his divine might is doubled. The third, also very precious, is his iron gloves, which he puts on whenever he would use his mallet efficiently."
Source: Bulfinch - Norse Mythology