Karin wood ball, round ball, Feng Shui goods, health ball, high-grade wood carving, 5cm, antique, health goods, health ball, fitness ball Health goods, health ball, fitness ball Two wooden spheres, "Nigikoro". A health item that allows anyone to easily exercise their fingers. It's easy to use. Simply hold these two spheres in one hand and roll them around in your palm. You can easily stretch in your free time, such as while watching TV or during relaxation time before bed. You can also use it for massage by pressing it against your shoulders, neck, lower back, or feet to relieve stiffness.