Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
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.