Rebaxan Columni was the industrial entity responsible for the creation of the MSE-6 "mouse droids," these droids were designed and put into service during the Age of the Republic, and their extensive utilization continued for many decades. They were especially common in the installations of significant galactic factions such as the Galactic Empire, the New Republic, and the First Order. Furthermore, this corporation also produced the sentry droids used by the First Order.