Around 22 BBY, three of these droids were used to attack the DuchessSatine Kryze aboard the Coronet. They were smuggled aboard by SenatorTal Merrik. During that incident, two of the droids attacked and killed the two clones guarding the cargo bay while the third remained hidden. One attempted to deceive GeneralSkywalker by hiding behind the dead body of Redeye, but was discovered and had two of its legs sliced off, then was shot repeatedly by clone troopers. The second droid escaped up the turbolift shaft and was dispatched by Obi-Wan Kenobi. Both droids, after being destroyed, launched dozens of small probe killer droids through pits on their heads. The third droid released the probe killer droids while still hidden, then attacked CaptainRex, but was dispatched after Skywalker cut off it's legs with a lightsaber throw and Rex had unloaded several blaster pistol rounds into the pits on its head.