The demagnetizer for watches.
The beat accuracy of watches is influenced by magnetism. The mechanical movement should be demagnetized either in the assembled or dismantled state after every service and cleaning.
Particularly the balance spring, mainly for older movements, can have become magnetized over time. Any harmonic oscillation of the spring is then no longer possible: The watch does not run accurately. The tool can also represent a "source of danger" and transfer magnetism and should, therefore, be demagnetized before use with watch movements.
Elma Antimag demagnetizes complete watches (attention: electronic quartz watches must not be demagnetized), dismantled movement parts, case, and tools in milliseconds by pressing a button.