Tension springs are mechanical devices designed to absorb and store energy when they are stretched. They are made of coiled metal wire and work by pulling apart two ends, creating tension. This tension helps to return the spring to its original shape when the force is removed, making them useful in various applications. These springs are commonly found in everyday items, such as clothes pins, toys, and automotive parts. They play a crucial role in providing resistance and support, ensuring that mechanisms operate smoothly and efficiently. Tension springs are essential components in many machines and devices.