Infinity Puzzle - Hanayama Metal Puzzle

The Infinity Puzzle earns its name for both style and mechanics. Not only do the pieces resemble the sign for infinity (a horizontal 8), but their motion continues in an infinite loop until the pieces are taken apart. This puzzle comes equipped with 3 interlocking pieces. The first is the frame, the infinity shape, and the other two pieces fit inside the left and right circle of the figure eight. The solution might seem simple at first, but this puzzle has one of the hardest ratings out there!