Weston Industries supplies Double Torsion Helical Spring. Weston Industries offers a wide range of springs like compression springs, extension springs, conical springs and also wire form components for use in various industrial applications. The Double Torsion Helical Spring is used to exert a torque or rotary force that are subject to bending stress and also provides resistance to externally applied torque. The Double Torsion Helical Spring is usually of close wound type that reduces in coil diameter and increases in body length as deflected.