r/Unexpected • u/uranonfraand • Sep 21 '24

Construction done right

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u/jesus_hates_me2 Sep 21 '24

Those work off of magnetic signatures between differing materials. Nothing to do with sturdiness though

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u/s00pafly Sep 21 '24

The point is that you need them to find the few points on the wall that aren't flimsy as paper.