Vintage Chinese Shou Xing Baoding Balls Health Harmony Medicine Hand Exercise

Vintage Shou Xing IRON BALLS, which are also known as Baoding balls/ meditation balls/Chinese exercise balls/Chinese Health Balls/Chinese medicine balls/Harmony balls, etc. Rotate 2 or more of these balls in one hand repeatedly to improve finger dexterity, relax the hand, or aid in the recovery of muscle strength after surgery. Cool collector's item. The balls measure 6 1/4" around and are made out of what appears to be marble or something similar to it. In original box with directions attached. Smoke free home.