Kombi

This CAD model was designed by Oskar van Deventer, copyright (c), 31 August 2025.

Kombi Too is a four-ring combination lock. Each ring has ten segments, numbered 0-9. The segments have different size. The goal of the puzzle is to take apart into 40 dovetailed pieces. When the two rings are properly aligned in a running-bond brick pattern, using the secret solution, then one can pull out a triangle of six pieces. After that, everything can be taken apart easily.

Here are some links about this design.
https://www.youtube.com/watch?v=_UZee38vI2A
https://puzzleguy.store/products/kombi-too-four-ring-combination-lock-with-a-twist
https://twistypuzzles.com/forum/viewtopic.php?t=40563

Feel free to 3D-print an extra sample to give to a friend, as long as you mention the designer and don't charge money.

If you are planning to sell some samples, then please contact me for a license agreement. The royalty fee is 10% of your selling price.

Please do not upload the design to a commercial service, or redistribute the design in any way other than linking to the YouTube video: https://www.youtube.com/watch?v=_UZee38vI2A

Enjoy!

Oskar
25 October 2025

Contact: 
https://oskarvandeventer.nl/index_contact.php?subject=Print%20It%20Yourself