Tai Chi Ruler is an ancient system of Taoist exercise known as chi-kung (energy cultivation) which utilizes a specially carved symmetrical wooden artifact known as the Tai Chi Ruler. Rounded at the ends and center, the design is derived from the shape of ancient Chinese Sword Handles. The Tai Chi Ruler serves as a focusing device of your natural coordination and balance, by integrating mind and body. 11" long, made from ash wood.