Contrary to popular belief, the saberstaff is not simply two lightsabers joined at the pommel, although it is possible that some have been created in this manner. Satele Shan's saberstaff was at one point cleaved in two by Darth Malgus, and the saberstaff became instantly disabled as a result. A saberstaff can also be used with only one blade extended, or the two blades can be extended simultaneously.
As the Dark Lord of the Sith, Exar Kun's signature weapon was his blue-bladed lightsaber. The hilt was shorter than saberstaff's of the future, yet able to ignite one blade at a time. Kun used the lightsaber to slay his former Jedi master Vodo-Siosk Baas and briefly fight Master Ood Bnar.
Grand Jedi Master Satele Shan carried at least two virtually or completely identical saberstaffs, both of which possessing blue blades. The first was carried on the Korriban orbital security station which she used against oncoming Sith forces. It was then that she alongside Jedi Master Kao Cen Darach engaged Darth Malgus and his master Vindican in saber combat. When Kao ordered Satele to retreat, the Jedi tossed her Saberstaff to her master and he used it until he met his demise at the hands of Malgus. After this, it was presumed the weapon was in fact destroyed. In the game however, Satele can be seen carrying a different saberstaff on her person.
On the planet Alderaan, Satele wielded her second saberstaff against several Battle Droids and Sith Warriors. Satele went on to engage Malgus who managed to severe her weapon in half, possibly either destroying or disabling it.
Jaesa Willsaam is known to utilize a saberstaff in Form III lightsaber combat known as Soresu.