Mjolnir (Thor's Hammer)

Length:  22.7"
Working Face:  6.5" x 6.5"
Weight:  42.3 lbs

Thor wields the enchanted hammer named Mjolnir, one of the most formidable weapons known to man or god.   Forged out of the mystical metal uru, whose chief properties are durability and ability to maintain enchantment, the hammer is 2 feet long and its handle is wrapped in leather which terminates in a thong.  Besides being a nearly indestructible throwing weapon, the hammer has been given six enchantments by Odin to augment its physical qualities.

1. No living being can lift the hammer from the ground unless he or she is worthy.  Provisions to that enchantment require that there can be but one worthy wielder of the hammer at a given time, and the current wielder must be bested in fair combat by a worthy contestant in order for that contestant to win it.
2. Causes the hammer to return to the exact spot from which it is thrown after striking its target.
3. Enables its wielder to summon the elements of storm (wind, rain, thunder, and lightning) by stamping its handle once on the ground.
4. Enables the hammer to open interdimensional portals, allowing its wielder to travel to other dimensions, such as from Earth to Asgard.  (It is now know how Thor determines which dimension he wishes to travel to.)
5. Given the hammer by Odin in recent times, enables Thor to transform into the guise of a mortal, physician Donald Blake, by stamping the hammer's head to the ground twice.  A provision of this enchantment requires that the hammer can not be out of Thor' s hand for more than one minute without his spontaneous reversion to his mortal self.  When Thor transforms to Blake, his hammer takes the appearance of a gnarled wooden walking stick.  So disguised, the hammer's enchantments limiting those who could lift it are not in effect.
6. The hammer had one enchantment that has been rescinded.   Formerly the hammer could be swung in such a way as to generate chronal displacement inertia enabling its wielder to travel through time.  This property, discrete from the hammer's dimension-spanning ability, was recently taken away by Immortus, whose mastery over time exceeds that of the gods themselves.

By throwing the hammer and grasping its leather thong, Thor can magically propel himself through the air in the semblance of flight.  Just as the hammer can magically change its course in order to return to his hand when he threw it, so can it be influenced by its wielder to change its course while it was in his grasp.   The precise manner in which Thor "steers" his hammer while in flight is no known, nor is the precise speed and distance Thor can attain with a single throw.   Thor has been observed to be able to attain escape velocity from Earth's gravity with a single throw and to overtake space vessels.

Very few people have ever lifted Mjolnir.  Besides Thor himself, the only others are:

1. Odin
2. Air-Walker (Thor #305)
3. Tiwaz
4. Beta Ray Bill
5. Captain America
6. Red Norvell (with the aid of gauntlets)