NM-K reconstitutor

"They are covered in microscopic droids of a highly volatile nature."
"Nano-droids."
"Yes, nano-droids."

―Russo-ISC and Anakin Skywalker discussing the bombing of the Jedi Temple hangar^[4]

NM-K reconstitutors, also called nano-droids, were a type of microscopic droid mainly used in electronics fabrication. At a mere 1.5 nanometers in length, nano-droids were undetectable, except by dedicated sensors. The droids were stored in a suspension of electrolytic transfer fluid, and workers would apply them to material using a swab or roller. If illegally reprogrammed, NM-K reconstitutors were capable of reconstituting carbon-based matter into dangerously unstable configurations, with the potential to create violent explosions. Because of such deadly applications, nano-droids were strictly regulated by Galactic Republic law and prohibited outside of closely monitored industrial uses.^[3]

Late in the Clone Wars, Letta Turmond, under the direction of Jedi Barriss Offee, fed nano-droids to her husband, a Jedi Temple worker named Jackar Bowmani, and used him to stage a bombing of the Temple's hangar.^[5] The resulting explosion killed Bowmani and twenty five others, with dozens more wounded and extensive damage inflicted to the hangar.^[3]

In 9 ABY, Helgait, the Head of Security of the planet Plazir-15, also staged a conspiracy by sabotaging a batch of the droid lubricant Nepenthé with the NM-K Reconstitutors he had illegally acquired, causing droids that uses the lubricant to be reprogrammed and act aggressive against their human masters.^[1]