The Torsion spring can store and release energy. Torsion Spring is a kind of cylindrical helical spring which burdens torsion moment. The spring makes use of lever principle to get huge mechanical energy. The end part of the spring is all kinds of arms. The spring is from single torsion to double torsion. Torsion Spring is used in balance mechanism and applied in automobiles, motorcycles,shipping,electronics, home appliances,commercial installations and other fields.