[Product Information]

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• Old fashioned heavy metal brain teaser disentanglement puzzles. Bonus: Twisted Nails Separate the Nails Puzzle.
• Objective of DOUBLE TROUBLE is to remove the LONG NARROW SHUTTLE (indicated by BLUE arrow)
• Replacing the shuttle to the starting position is equally as challenging.
• Rated as a level 4 "Very Difficult/Very，Very Severe" (on a scale of 1 to 4). On this scale both level 3 and 4 are very challenging.
• Packaged in sturdy WHITE BOX， cloth bag and with solution.