Beautiful baoding balls made with natural bloodstone gemstone Non-chiming balls you can use quietly. Medium size for small to average hands. Large size for larger hands or more skilled users. A non-strenuous exercise you can do in any place, time, or occasion. Great for all ages. Keep your hands, fingers, wrist, and arm healthy. Recommended by hand therapists, using baoding balls can strengthen your hands and keep them flexible to manage various hand conditions. Improve circulation and concentration. Fine motor movement exercises the brain keeping it sharp. In Chinese medicine, the hand is a central connection point of the meridians. The exercises clear the meridians allowing chi to flow freely easing the spirit. Bloodstone gets its meaning from Greek which means sun turning. It is a dark green stone with spots or bands of red that resemble drops of blood. Because of this, it was often carried in amulets or jewelry as it was believed to stop bleeding and wounds.