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 OMM command battle droid. Trade Federation security droids fulfilling their most common role as guards on capital ships carried the standard weapons (E-5 blaster rifles) used by similar models.
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.
The OOM Security battle droid was first designed as a security droid. It was manufactured by Baktoid Combat Automata as part of the OOM droid line. OOM security battle droids were created for defense and detection. They generally operated in squads led by an OOM commander droid on Captain starships. One such squad was the squad lead by OWO-1. The OOM security battle droid served as the basis of the B1 battle droid.