This Twin box is an improved secret box.
This box's mechanisms can'tmove singly.
When two boxes are combined, you will be able to usefour storage spaces.
Now, what kind of shape do you make?

This work was produced by Karakuri Creation Group’s craftsmen, from a selected idea of “7th Karakuri Puzzle Idea Contest”.

Original idea by Yasuhiro Hashimoto
Hand-crafted by Hideaki Kawashima (Karakuri Creation Group)