This is a very old Japanese woodworking joint. It's strong and configurable in 3 different orientations.

I originally made this model and uploaded it to Thingiverse in 2014 under the username I_Makes_tuff. Since then it has popped up and remixed in a few different places and other people have created their own. I am uploading it here because I don't use the old site any more and I want to work on integrating it into new models and fine tune it.

I expect to add changes soon and encourage you to remix it and play with it. Photos coming soon as well.

Public Domain license so do whatever you please with it. I didn't invent it so don't need any credit.