Think of the satisfying click of a retractable pen. That’s a compression spring at work. These springs are designed to compress under a load, acting as a cushion to absorb energy. TDesigned to operate with a compressive force, compression springs are often found in automotive suspensions, pens, and medical devices. They’re designed to compress as a load is applied, then return to their original shape once the load is removed. Compression springs can have different end types, such as open, closed, and ground, to suit various mounting requirements.