The Karakuri New Secret Box IV is a Binary Trick Puzzle that requires quite a few steps to unveil the secret space. The opening sequence deviates from the New Secret Box I-III and is quite difficult to solve. All 6 plates shift. Measures approximately 3.15 x 3.15 x 3.15 inches. Comes in cellophane wrap and opening instructions. Created in January 2018 Made of Magnolia and Walnut woods.