Here’s another beautiful bit of wooden puzzle design and craftsmanship from Denver metagrobologist Kagen Schaefer. The locking mechanism was recently reverse-engineered by Instructables user dombeef, who has made a working paper version. Our past coverage of Kagen’s work is linked below.

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Sean Michael Ragan

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and makezine.com. My work has also appeared in ReadyMade, c’t – Magazin für Computertechnik, and The Wall Street Journal.


  • Anonymous

    What a beautiful piece of work!  Yet, I believe that there is a slight graphical hoax in the line drawings of the action.  The misimpression being that the triangular pieces as they move against one another can stay exactly within the bounding outer rectangle.  That is, starting with the upper right illustration where there is no central diamond void, move any of the triangular pieces and their boundary will protrude from the bounding box.  (drove me nigh nuts thinking that it would be otherwise)

  • http://twitter.com/ianlee74 Richard Ian Lee, Sr.

    Would love to see a video of how this operates.

    • Dominick Anatala

      Me too!

  • http://twitter.com/ianlee74 Richard Ian Lee, Sr.

    Would love to see a video of how this operates.