These orthodontic coil springs, presented in a 10-piece pack, are designed to apply torque (rotation around the longitudinal axis) to individual teeth or groups of teeth during treatment. They are essential for achieving precise three-dimensional control of tooth position. The pack includes a variety of sizes (large, medium, and small) to accommodate different clinical needs and tooth sizes, allowing the orthodontist to select the most suitable spring for the application of specific forces. They are used by inserting them into the archwire and activating them to rotate teeth in the desired direction, which is crucial for correcting dental angulations or rotations and achieving optimal occlusion.