1.1pc hook tension springs pack with 0.4 mm wire diameter and 5 mm outside diameter Key specifications - Pack size: 1.1 piece - Wire diameter (WD): 0.4 mm - Outside diameter (OD): 5 mm - Length: 85 mm to 300 mm - End type: hook ends - Material: steel - Features: strong tension, elastic coil, extension rings What this offers - Strong pulling force: designed to provide reliable tension and return action in mechanical assemblies - Durable material: steel construction for long-term use in common repair and DIY projects - Flexible length options: available in a wide 85–300 mm range to fit various applications - Easy installation: hook ends allow quick, secure attachment to linked components Compatible applications - Replacement or repair of small tension springs in household hardware, small appliances, or tool assemblies - DIY projects and hobby robotics where a stable pulling force and fast return are required - Cabinet, gate, or furniture hardware where a reliable spring tension is needed for smooth operation Use scenarios - Scenario 1: Replacing worn springs in a small appliance latch or door mechanism to restore proper closing tension - Scenario 2: Building a simple lever or pulley system in a DIY robotics or model project that requires a dependable pull and reset action - Scenario 3: Repairing cabinet or hinge hardware where a strong, constant tension helps keep doors closed or levers in position Notes - Ensure the length selected matches the available space and the load requirements of your mechanism - Inspect hooks and mounting points for compatibility with the spring ends and secure attachment