The lightsaber is a fictional weapon that plays a key role in the movies, games an novels that constitute the Star Wars universe. Lightsabers are science fiction versions of their namesake, the saber. Instead of a metal blade, the lightsaber holds an energy blade about one meter in length. Lightsabers differ in color based upon the specific crystal used in construction. Though they often behave like regular swords, they are able to cut through most matter with little or no resistance and to deflect blaster bolts, Force Lightning thrown by Sith Lords, and other lightsabers.