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The complexity of a puzzle box is determined by the "steps" required to open it. Common mechanisms include:

: Originating in Japan’s Hakone region during the late 19th century, these boxes were created by master craftsmen like Ohkawa-san. They are traditionally decorated with Yosegi-Zaiku (fine wood mosaic) to hide the seams of the moving parts. mechanical-puzzle-box

How This Guy Makes the World's Best Puzzle Boxes | Obsessed | WIRED The complexity of a puzzle box is determined

: Modern boxes often include "tools" (like a hidden key or a metal pin) found in the first few steps that are necessary to solve the later stages. 3. DIY and Construction Materials How This Guy Makes the World's Best Puzzle

: Companies like Ugears offer laser-cut plywood kits that use mechanical transmission designs to create "treasure boxes" with working lids and sides.

: Internal gears or dials that must be aligned to a specific "code" or orientation.

While high-end boxes are made from exotic hardwoods, many hobbyists use accessible materials for prototyping or entry-level builds: