Coil spring

A coil spring is a helical-shaped metal device that stores mechanical energy through compression or tension. When compressed or stretched, it resists deformation and then returns to its original shape, providing cushioning, support, or energy absorption. Commonly used in vehicles, mattresses, and machinery, coil springs help absorb shocks and maintain stability. Their design allows for flexibility and durability, making them essential components in many mechanical systems to enhance comfort and performance.