Magna-coil

A magna-coil, also known as a magnetic coil, was a magnetic device which was present in the dome of the R-series astromech droid QT-KT. Circa 20–19 BBY, QT-KT used her magna-coil to attract multiple swarm mines in order for D-Squad to help retrieve a Separatist encryption module from the flagship of the tactical droid Aut-O. The magna-coil attracted the swarm mines, then they were safely placed into her dome. Later, the magna-coil was released out of her dome and also released the swarm mines, which then destroyed multiple battle droids.

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