A Lightsaber (sometimes spelled lightsabre) is a fictional science fiction weapon from the Star Wars films. It consists, in the Star Wars universe, of a powerful beam of energy emitted from a cylinder-shaped handle. According to canon, the weapon emits a beam of intense light almost a meter in length and the diameter of an average human male's thumb. It emits no heat, but can cut through any kind of matter -with the exception of another lightsaber. In the hands of a skilled user, the beam can deflect blaster bolts and absorb Force weapons such as Sith lightning.
Other versions vary in style and usage. Dual-bladed lightstaffs, tonfa-styled, and other variations are seen and referenced in the Star Wars universe. The original three props used in the first Star Wars film in 1977 were modifications of the old Graflex (Luke Skywalker's) and Heiland (Darth Vader's) camera flash accessories with extra attachments added on them, and pieces from old weaponry and a grenade were used to make Obi-Wan Kenobi's lightsaber prop.
Lightsaber replicas and toys are widely available, and there are various artists worldwide who are building a vast number of variations of these for sale online. Some just as non-working show props, and others with brightly glowing, non-cutting blades. Complete with actual sound effects emitting electronics in the hilts.