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The world is full of cognitive challenges, so it’s beneficial to exercise your mind and not just your body. This billiard ball-sized USA-made mechanical puzzle composed of three identical parts will test your cognitive flexibility and dexterity. The challenge is in trying to assemble the three pieces to make a flawless 2.25-inch diameter sphere, and although it may seem easy to accomplish, the puzzle will require zen focus. Forged from molten stainless steel at temperatures above 2,500°F, this puzzle is a work of functional art. Keep this at your desk and use this beautifully crafted mind-bender for mental reps to keep the juices flowing.