The Heavy Guardian represented a substantial, two-legged droid design, equipped with a trio of grasping appendages on each of its arms. A collection of these droids were maintained by G0-T0 aboard his Droid Yacht for the purpose of engaging and eliminating unwanted visitors. Furthermore, G0-T0 also possessed a larger contingent of this same droid type stationed on Nar Shaddaa, where their roles included espionage and assassination. On Nar Shaddaa, these droids were disguised as cleaning units, employing sonic vibrations for cleaning purposes. Droids of the very same construction were also utilized as maintenance units within Vogga's warehouse.