Hidden drawer with magnetic lock - GIF

Hidden drawer with magnetic lock.

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Previously:

https://www.homemadetools.net/forum/...867#post175385
https://www.homemadetools.net/forum/...242#post180832
https://www.homemadetools.net/forum/...931#post119826
https://www.homemadetools.net/forum/...524#post139365
https://www.homemadetools.net/forum/...312#post138810

Cool, clever, even sneaky - in the best sense of the word, natch.

I can probably suss out how I'd "hide" a secret drawer behind the front of another drawer, at least after boffing it up after a couple of attempts. I'd be interested, however, in more info about these magnetic locks. In the words of the philosophers Violent J and Shaggy 2 Dope, "How do they work?"

The filming at arms length obscures the 'works' of pretty terrific cabinetmaking.
The user is holding a coin-sized disc, either a magnet or a ferrous slug. Drawers carry mating part, unlatching vertically as the disc is applied.
This early Sunday armchair engineer feels the disc should be the magnet, not in the drawer collecting material that would interfere it being able to slide. A couple stacked neodymium cylinders up generate a serious field to pull the lock 'bolt' in the correct direction. Removing it of course re-latches the drawer, a bevel might cam it while being shut, gravity does the rest.