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  • Hanayama's key puzzle is a high quality cast metal brain teaser

  • Discover how to separate these two interlocking pieces and then try to reassemble them!

  • Hanayama cast metal brain teasers have 6 levels of difficulty and each puzzle is mensa-rated

  • Level 1 puzzles are considered easy by most puzzlers

  • Two keys appear to be permanently linked, and no matter how you look at it, there is seemingly no solution to unlocking them. However, as a highly popular puzzle since its creation during the 19th century puzzle craze, the keys are in fact separable. The hint is "Enlarge."

    KEY Hanayama Cast Metal Brain Teaser Puzzle Level 1