<ul><li>It may take an infinite amount of time to solve this mind-boggling metal brainteaser by designer Doug Engel.</li><li>A great gift for people who love brainteasers and trick puzzles.</li><li>Will you be the one to unravel the mystery?</li><li>Try to take the four nickel-plated pieces apart then fit them back together. 2-1/2" in diameter.</li><li>Solution included.</li></ul><br><br>It may take an infinite amount of time to solve this mind-boggling metal brainteaser by designer Doug Engel. Try to take the four nickel-plated pieces apart then fit them back together. 2-1/2" in diameter. Solution included.

Bits and Pieces - Black/Silver Yin and Yang Metal Brainteaser Puzzle-Metal Puzzle Brainteaser, Nickel-Plated - Measures 2-1/2" in Diameter