[Versatile Set] 12-piece tension spring with hooks, perfect for production, assembly, experiments, research, and maintenance. [High-Quality Material] Crafted from premium spring steel with high carbon content for exceptional elasticity, fatigue resistance, and long lifespan. [Easy to Use] Simply hang items on both ends or one end of the 60mm long, 10mm outer diameter, 1mm wire diameter springs. [Excellent Expansion] Springs offer excellent expansion and rebound force, ensuring reliable performance. [Wide Applications] Suitable for various fields including marine, computer, electronics, automotive, and more., Manufacturer: OTOTEC