Torsion springs is a complex design principle in all spring categories,and the types vary widely,so the theory involved in design is also the most complicated. The ends of thesprings are secured to other components that pull them back to their original position as the other components rotate about the center of the it, creating a torque or rotational force. The spring can store and release energy. The direction of the wind is also important for the application of the torsion springs, since the bearing/attachment position of the leg must be on the left or right side during assembly.