Lightsaber

A Lightsaber is a melee weapon used by the Jedi and the Sith. Upon activation, the weapon projects a Laser blade that extends to a certain length, usually about three feet, and is used as a defensive and offensive weapon. When the wielder activates it, a power cell projects energy through a crystal which gives the beam its color and form; next the focused energy goes through a crystal lens which gives the beam its shape, finally, the laser beam goes through an emmiter fixture, which keeps a tight magnetic grip on the beam, keeping it at the desired length.