According to Chinese traditional medical theory of Jingluo, the hand contains a network of channels which circulate vital energy. Acupuncture points are distributed along these channels. Rotating the iron balls within our hand stimulates the acupuncture points leading to better circulation (and unlocking vital energy). The Health Balls are placed in the palm and then rotated in a circular manner. Cloisonne health balls are packaged in beautiful dragon silk box. - 1.5" ball.