Chinese ancient educational toys, was said to be wise invention, it was also said to be a master carpenter Lu Ban invention, which is "Ming lock" in a series of works, consisting of 18 quick, bite each other, assembly difficulties Note: Please download 3dm stl file or files, gcode is prepared for ormerod1 Google Translation 2014-10-17 KongMing lock, also called “Burr puzzle”, is a huge series, here is just one of them, 18 symbolizes the Buddhist inside 18 Rohan. Read more on wiki http://zh.wikipedia.org/wiki/%E9%AD%AF%E7%8F%AD%E9%8E%96 Watch video on youtube https://www.youtube.com/watch?v=BPCOgdLlDhk Or google more I will add more models in the future Good luck!