Assemble the model to make a mechanical box.
The do-it-yourself wooden puzzle box is extremely well designed with very tight tolerances and good machining. The interlocking mechanisms are pretty ingenious. Add an elegant touch with this beautiful box. To open it, you must input a code and then use the key. Perfect for storing your private items or jewelry. With laser-cut technology, the pre-cut wooden pieces are easy to pop out of the sheets. Made with safe and environmentally friendly wood from all-natural trees without any added toxins. The model comes packaged with clear, simple, and very detailed English illustrated instructions. Ages: 14+158 PiecesAssembled size: 10 cm x 12.4 cm x 8.5 cm / 3.9 in x 4.9 in x 3.4 in Difficulty Level 4 out of 5Approximate Assembly time: 5 hoursNo glue required.