Marble Operated Door Knob

 |  |  |  November 22, 2016

Buy  Price: $45.00+   Link Hat Tip

Paul Myers designed this replacement interior door knob which can only be opened by dropping a marble into its top. It’s made from 3D printed PLA, Airsoft and skate bearings. You can pick one up in his Etsy shop, Beta Things. We dig his business card embosser too.

Marble Lock

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