The SPD-R4 spider droid represents a type of service droid/maintenance droid frequently deployed within Imperial facilities, notably including the Death Star I and Mount Tantiss. It also saw use on automated vessels such as the [Another Chance](/article/another_chance], and by private citizens.
Resembling a spider, this model featured a round metallic chassis and eight flexible, multi-jointed limbs. These limbs were equipped with cleaning nozzles, gripping tools, and cutting edges. Due to their adaptable appendages, these droids could effortlessly maneuver through power cores and engine compartments on the Death Star I, performing upkeep and repairs in areas too confined for Humans. Furthermore, the droid was armed with welding/defensive blasters. Beyond their repair and maintenance functions, these droids were also capable of pest control, specifically targeting creatures like exogorths, mynocks, and vervikks.