Compression springs are the most common spring type used in the engineering industry, and comprise around 50% to 60% of all springs manufactured. In terms of energy storage per unit volume of material, they are amongst the most efficient spring types available. It is also possible to manufacture to relatively tight tolerances on loads and dimensions. These springs are widely used in a large number of industrial products such as pumps, valves, pneumatic components, drilling equipment, automated and robotic systems, and also across various industries.