Pit Droid
this is the generic term used to describe any small droid which works in a multitude of capacities in vehicle repair shops. Created on the planet Cyrillia, most pit droids are very small in stature (similar to the E-series of household droids), with flat, bowl-shaped heads and a single optical unit mounted on the nose. When not in use, pit droids were designed to collapse into a compact form when hit on the nose. Another jab at the nose would reactivate the small droid. Note that issue 6 of the Star Wars Kids magazine claims pit droids were manufactured by Serv-O-Droid.