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Down & Dirty Radio w/ Steve Hoefer and his Secret Knock-Detecting Lock

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Published on Nov 7, 2011

In our Craftsmanship segment, we're calling up Grathio Labs main brain Steve Hoefer. He's a true visionary making some very cool innovative stuff, and we caught up with him to talk about his Secret Knock Detecting Lock invention that's been making the rounds on YouTube.

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