Developed by Arakyd Industries, the DRK-1 probe droid was a small, spherical automaton equipped with sophisticated sensor and communications packages. The design dated back centuries to early Dark Eye models based on schematics provided by Sith holocrons. The DRK-1 version featured a trio of imaging sensors: a central photoreceptor, a magnetic imaging device, and a thermal imager. An antenna atop the Dark Eye's dome allowed its master to relay commands to the probot, programming it to seek out individuals or information. Data was then sent back to headquarters via the transmission antennae.
Dark Eye probe droids were designed as passive spy units, and were plated with energy-absorbing stealth armor that baffled most sensor scans. However, weaponry could be mounted on the DRK-1 in many configurations, the most common being a miniaturized grenade launcher. Armaments adopted by the Sith included blaster cannons, stun blasters, and dart launchers loaded with poison needles.
DRK-1 probe droids were commonly seen in the years prior to the Battle of Ruusan. Darth Maul carried three Dark Eye probe droids aboard Scimitar during his time as the apprentice of Darth Sidious. Maul recreated these spherical robots using the most disparate, off-the-shelf pieces. He also used his probots to spy on a Black Sun meeting on Ralltiir, and later used them to track down Qui-Gon Jinn on Tatooine, where the Jedi struck down one of the spying probes. The act resulted in a misunderstanding that cost the life of Pa'lowickpilotAneesa Dym at the hands of Maul.
Following Maul's presumed[5] death at the hands of Obi-Wan Kenobi, the Sith Infiltrator, presumably along with the last two remaining probe droids, was taken into custody on Naboo by the Jedi.
During the Galactic Civil War, many bounty hunters found droids of this model very useful and effective in tracking their prey throughout the galaxy. However, because of their size and communications range, they were only useful in planetary surface tracking.