Torsion springs are coiled springs made to work via a twisting or 'torsion' rotational motion, which in essence allows for a flexible object to store mechanical energy when it is twisted. This exerts a force in the opposite direction; dependent on the angle it is twisted. The most common design of a torsion spring is the helical looped design that consists of a coiled metal wire, which is twisted tighter and tighter by the sideways forces applied to either a left-hand or right-hand helix. A perfect example of a torsion spring in action would be that of a standard mouse trap