The Cast Key is one of the long-selling puzzles in Hanayama’s Cast Puzzle series. The objective is to separate the two keys and then restore them to their initial state. It looks simple, but in fact, involves a little trick. Beginners should therefore be careful not to pull them apart by force.
Hanayama cast puzzles are some of the world's finest brain teasers. These high-quality, cast metal puzzles come in six challenging, Mensa-rated levels of difficulty. Key is level 1.
Hanayama puzzles are recommended for ages 12 and up
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