Material: 304 stainless steel for durability and corrosion resistance. Precise size: wire diameter 2 mm (0.079 in), outer diameter 12 mm (0.47 in), length 324 mm (12.76 in). This exact size combination delivers a strong, secure fit for a variety of applications. Strength and elasticity: strong hooks at both ends with a uniform pulling force; loops at ends provide firm attachment points; the spring's elasticity offers powerful resistance and reliable resilience under tension. Wide application: suitable for manufacturing, research, electronics, tools, toys, construction, and machinery; widely used across automotive and aerospace sectors as well. Use scenarios: In electronics enclosures to maintain lid tension and ensure a reliable, returning action. In automotive or aerospace prototyping to provide a predictable force in fixtures or assemblies. In machinery and construction setups to maintain belt or linkage tension and to secure panels or components.