Brand new ball joints of hand skeleton are made with lightweight stainless steel. From the root of the finger to the tip of it, there are 27 movable joints, including 5 360-degree movable joints and 1 multidimensional ball joint. Such design has crossed the restrictions of mechanical feeling ever before. No matter grasping or bending and stretching, hands movements of the dolls can fully express the trajectory of that of a real person.