This Secret Puzzle Box can be opened in 12 steps. Beautiful Ichimatsu inlay on the lid with a Walnut adorning the sides and reverse of the puzzle box. Opening method of the puzzle box : 12 steps Moving panels and Slide keys : have 3 panels / 2 keys Outside size : 3.5x2.6x2.0 inch (90 x 60 x 50 mm) Inside storage space size : 2.20 x 1.92 x 1.37 inch (56 x 49 x 35 mm) Include Description (solution sheet) and the gift box