Japanese Crystal Puzzle - 51 Piece Japanese Interlocking PuzzleBased on a historical 19th century Japanese design. Dazzlingly ornate and deeply intriguing construction. Symmetrical, multifaceted, and celestial in appearance. Composed of 51 non identical interlocking bars. Each piece is uniquely cut to mesh together seamlessly. Unlock one key piece to begin disassembly. Follow precise steps to release the remaining segments. Reassembling requires careful sequencing and patience. Designed for extreme puzzlers