The lightsaber was a weapon usually used by the Jedi, Sith, Force-sensitive Mandalorians, and other Force-sensitives. Lightsabers consisted of a plasma blade, powered by a kyber crystal, that was emitted from a usually metal hilt and could be shut off at will. It was a weapon that required skill and training and was greatly enhanced when used in conjunction with the Force. Though also used by the Sith, the lightsaber was synonymous with the Jedi, with some in the galaxy believing only Jedi could use lightsabers.
A lightsaber could cut through virtually anything, from flesh to blast doors. The only way to block the incoming attack of a lightsaber was with a weapon made with material that conducted energy, such as an electrostaff, a Z6 riot control baton, some rare metals like beskar, or another lightsaber.