Magnetic core extractor

A magnetic core extractor was used to remove the affects of anti-magnet cohesion (TV: Carnival of Monsters)

The Third Doctor used the magenetic core extractor (PROSE: Doctor Who and the Carnival of Monsters) to open the plates on the S.S. Bernice.

Jo used the magnetic core extractor (TV: Carnival of Monsters) to open the plates on the S.S. Bernice.