Can you take it apart? Can you assemble it again?
KEY II Metal Brain teaser puzzle consist of two very similar looking old fashioned metal padlock keys. Your objective is to separate the two keys and then re-join. Small, compact, hand-size, tricky puzzle. NO FORCE ever needed. Clever puzzle, moderately challenging, always fun. Hanayama rates this as a level 2 on a scale of 1 to 6.