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Magswitch: switchable permanent magnet. A twist of a knob turns on a magnetic field strong enough to lift this 5.2 kilogram (11 pound) chunk of railroad rail. Magnetic fields, when combined, can be either additive or subtractive. This Magswitch model, the Magjig 60, works by aligning and counter-aligning two strong neodymium dipole magnets within a field channeling ferromagnetic casing.
Source : http://magswitch.com.au/product/magswitch-magjig-60/
Reposted fromsfm sfm viapsyentist psyentist

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