Aug 26
We all know the world’s going to end at some point, and sure, maybe it’s not entirely "likely" to happen anytime soon—but better safe than sorry. So assuming you’ve already been working diligently on your underground, radiation-proof bunker, what’s going to happen when you need extra keys made with nary a (non-zombie) locksmith in sight? Fortunately, as Hack A Day shows us, there’s an easy, accurate enough way to make your very own spare keys with nothing more than some plaster, the sun, and a giant fresnel lens.
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