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Hanayama has done it again, with the cast metal Quartet Puzzle. Inventor Mine Uyematsu has designed this brainteaser puzzle with a bond that's truly difficult to disentangle. Consider how such a bond is formed, and you'll discover the secret to breaking it. There are two approaches to this puzzle - are you clever enough to find them both? And once you've disassembled the interlocking rings, can you reassemble the puzzle? This amazing brainteaser puzzle is just one of the many intriguing puzzles from Hanayama.

Difficulty Level 6