Approx. 15 cm x 15 cm x 15 cm / 5.9 in x 5.9 in x 5.9 in
Three cubes are connected, and it is impossible to separate them. One of joining plates is the key. If you slide the 1st step plate of one box, you can not open the other two boxes. It takes 38 (8+7+8+7+8) moves to open all the lids at the same time, which accounts for the more difficult rating.
Made by: Karakuri Creation Group Solution included. Size : Approx. 15 cm x 15 cm x 15 cm / 5.9 in x 5.9 in x 5.9 in