Sith lightsabers, also known as Sith sabers, were lightsabers wielded by members of the Sith. They were constructed through methods similar to those used by other Force-sensitives, but the underlying philosophy was different. Unlike users of the light side of the Force, Sith couldn’t establish a mutual bond with kyber crystals. This was due to the hate, fear and other emotions associated with the dark side that clouded their concentration.