Hair springs are small, coiled metal components used in various mechanical devices, such as watches and clocks. They store energy and release it gradually, allowing for precise movement and timekeeping. The design of hair springs is crucial for the accuracy and reliability of these timepieces. These springs are typically made from high-quality alloys to ensure durability and resistance to wear. The term "hair spring" comes from their fine, hair-like appearance. They are essential in the functioning of mechanical watches and are often adjusted for optimal performance in horology.