Thor has two he-goats, by name Tooth-Gnasher and Tooth-Gritter, and a chariot, wherein he drives and the he-goats draw the chariot; therefore he is called Őku-Thor. He also has three things of great price: one is the hammer Mjolniir, which the Rime-Giants and Hill-Giants know, when it is raised on high; and that is no wonder, -- it has bruised many a skull among their fathers or their kinsmen. He has a second costly thing, best of all, the girdle of might, and when he clasps it about him, then the godlike strength within him is increased by half. Yet a third thing he has, in which there is much virtue; his iron gloves, he cannot do without them when he uses his hammer-shaft. But no one is so wise that he can tell all his mighty works; yet I can tell thee so much tidings of him that the hours would be spent before all that I know were told.
From: The Prose Edda by Snori Sturlson, translated from the Icelandic with an introduction by Arthur Gilchrist Brodeur, Ph. D., Instructor in English Philology in the University of California, New York, The Scandinavian-American Foundation, 1916.