This jig can help with the assembly of the 2-in-1 puzzle, made by cubic dissection. Puzzle not included! No instructions either, figuring out how to use the jig is part of the puzzle. You can also use it as a display stand after the puzzle is assembled.
Puzzle not included! To buy the puzzle go to: https://cubicdissection.com/collections/newly-released/products/2-in-1-stainless-steel
The author hasn't provided the model origin yet.