Due to this Puzzle being crafted as a limited edition or run, it is no longer available for sale. Regrettably we do not think it will be back in stock. Please view our other hard to find puzzles on our Karakuri Trick Box Page. Crafted by Mr. Honma Try to find the hidden key!! Please be aware that the bottom slides on Ruiji boxes are VERY tight and need to be opened from time to time. *Difficulty-Moderate Measures* 11.8 x 6.1 x 5.1 inches