Check the listing for details. JapanBargain Chinese Health Stress Relieve Hand Exercise Baoding Balls. Condition: New. Listed at 9.79 USD. Baoding balls are used by rotating two or more balls repeatedly in the hand. Intended to improve finger dexterity, relax the hand, or aid in the recovery of muscle strength and motor skills after surgery, Baoding balls work similarly to Western stress balls. Baoding balls are used by rotating two or more balls repeatedly in the hand Intended to improve finger dexterity, relax the hand aid in the recovery of muscle strength and motor skills after surgery Dimension: Each ball measures 1.75 inches in diameter Box Color VaryBaoding balls are used by rotating two or more balls repeatedly in the hand. Intended to improve finger dexterity, relax the hand, or aid in the recovery of muscle strength and motor skills after surgery, Baoding balls work similarly to Western stress balls. Baoding balls are used by rotating two or more balls repeatedly in the hand Intended to improve finger dexterity, relax the hand aid in the recovery of muscle strength and motor skills after surgery Dimension: Each ball measures 1.75 inches in diameter Box Color Vary