Usage Tips:Set of 12 extension springs suitable for machinery repair, garage door, and DIY projects, providing a sufficient quantity for various applications Made of highly Metal material, ensuring long-lasting performance and resistance to wear and tear The Extended Spring design with double hook, which can be better fixed on the mechanical equipment to ensure the stable operation of the equipment These tension springs offer consistent and reliable stretching force, ideal for applications requiring controlled tension or resistance. Tension Spring can be used in many occasions, such as production and assembly, experiment, research and development, maintenance,Home Repair, etc 12pcs x Extension springs with hook ends. With a sufficient quantity included, you'll have the right springs on hand for your projects. Offering reliable tension and flexibility, these springs are built to withstand heavy-duty use and ensure long-lasting performance Colour:Silver Material:Metal Package Contents: 1set x spring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.