It appears like a box-like lump with a hole in it, but is actually comprised of two coiled up virtually identical pieces. You must try to take it apart by sliding and rotating the pieces. Although the pieces are angular in shape, they can be rotated in unexpected ways, making their movements quite intriguing. The theme of the puzzle is "coil." Designed by Edi Nagata of Japan.
Hanayama is known worldwide for challenging puzzles and quality manufacturing. Can you take the pieces apart, then put them back together again? Hanayama cast metal brain teasers have 6 levels of difficulty, and each puzzle is Mensa-rated. Level 3 puzzles are considered moderately challenging by most puzzlers.