Hammer

A hammer is a simple tool, used by most pre-industrial civilizations throughout the galaxy. Used to force solid objects into others. Or, forge metal into different shapes. Often symbolized as analogous to power on various worlds, such as Earth. The Ferengi, however view it as a sign of strong, sexual prowess. . Commander Spock made an hypothetical point of one, using logic. Explaining he need not know whether or not gravity will cause it to drop-when released. 

Background Information
USS Mjolnir was named for the Mjolnir. In Scandinavian legend, it was the hammer of Norse thunder-god Thor. Whomever was worthy to wield this weapon had the immortal powers of Thor.