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The magnet groove is designed very tightly, so the magnet can be firmly fixed in place without the need for any adhesive.
If necessary, I can adjust the design, such as enlarging the notch or making other modifications.
Feel free to leave comments with suggestions or requests for changes. We welcome your feedback.

A stylish and practical hidden compartment, with a design that looks just like a classic book. From the outside, it blends naturally into the bookshelf; while on the inside, it provides practical storage space for small valuables.
The model uses a magnetic lid closure, ensuring safe and convenient opening and closing. It uses a magnet with a diameter of 4 mm and a height of 1.5 mm, providing reliable suction without the need for force.
This design is optimized for 3D printing and does not require an AMS system, so it can be printed on standard printers. To achieve the best final result, it is recommended to glue the various components together, which not only improves durability but also enhances the overall appearance.