Compression springs are characterized by a space between the coils. The space between the coils depends on the size of the spring. When force is applied to the two ends of the spring, it compresses and its shape changes temporarily. When the force is removed, the spring returns to its original shape. The larger the number of coils and the spring’s length, the stronger the spring is, but this is always proportional to the thickness of the wires and the outside diameter. Compression springs can be manufactured in different shapes such as conical shapes, egg-like shapes etc.