Baoding are also commonly known as Chinese Exercise , Chinese Therapy , Chinese Stress , and Chinese Health . By rolling Baoding around in your hand while thinking in the office, watching TV or even out walking, you can use an ancient Chinese & very clever way of massaging all the points in the head for many while amusing yourself by moving the Baoding around in your hand Features - ColorSilver - Material: Stainless Steel. - Diameter: Approx. 52mm. - Traditional beautiful solid steel Baoding . - A handy instrument for . - Massager for pressing acupoints in your palms. - Based on traditional Chinese therapy. - field increases blood circulation and stimulates the nervous system. - Effective for the relief of fatigue, , muscle and stiffness. Package list: 2 * Pair of 52mm Baoding Balls Chinese Health Exercise Stress Balls Palm (Chrome Color)