NR-5
this was a series of maintenance droids produced by Kalibac Industries during the Galactic Civil War. It was generally believed that the NR-5 was produced to compete with the Treadwell series of droids, although Kalibac claimed that they were trying to compete with Industrial Automaton. The NR-5 was equipped with the Mechro-II brain, a heavy lifting arm, a fine manipulator arm, a general-purpose appendage, and a sophisticated visual sensor system. The NR-5 found popularity among shipboard technicians who needed additional assistance in starship maintenance, but the series suffered from a lack of durability. This meant that NR-5 droids working out of doors on many worlds needed continual maintenance, reducing its effectiveness. The NR-5 was virtually dropped throughout the Outer Rim when the R4-series astromech was introduced by Industrial Automaton, but the NR-5 was generally regarded as more effective than the R4 on more gentle planets.