OOM security battle droids were security droids of the Trade Federation and Confederacy of Independent Systemsusedforthe purposes of defense and detection. Security droids were characterized by red markings on their shoulders and upper abdomen, which distinguished them from other variants of the OOM model. They most commonly worked in squads led by an OOM command battle droid.
The ubiquitous model served as the basis of the B1 battle droid used in the Trade Federation's Droid Army, although the latter model had less complicated programming. However, the targeting and coordination of the security droids was little better than that of their cousins, and often failed to consistently hit their target.
Like the B1, the OOM security battle droid model saw varied use after the Clone Wars.