Karin Wood Balls, Spherical, Feng Shui Goods, Health Balls, High-Grade Wood Carving, 5cm, Antique, Health Goods, Health Balls, Fitness Balls Health Goods, Health Balls, Fitness Balls Two wooden spheres, nigikoro. Health goods that anyone can easily exercise their fingers. How to use: It's easy. Just hold these two spheres in one hand and roll them around in the palm of your hand. You can easily stretch in your spare time, such as while watching TV or relaxing before bed. Not only for the hands, but also for the shoulders, neck, lower back, and feet, you can also massage to relieve stiffness by pressing them against these areas.