PK-series worker droids were a model of labor droid used by the Trade Federation. During the Invasion of Naboo, a number of PK units were stationed on board the Lucrehulk-class LH-3210 cargo freighter Saak'ak. When the Confederacy of Independent Systems would use the PK-series, the droids were used for most support functions in their Droid Army.
- Star Wars: Absolutely Everything You Need to Know (First identified as PK-series worker droid)
- Star Wars: The Visual Encyclopedia (Picture only)
- Star Wars: Absolutely Everything You Need to Know, Updated and Expanded
- Rise of the Separatists