Item Descriptions:-Type:Dual hook, Wire Diameter:1.0mm/0.04inch; Outer Diameter:10mm/0.39inch; Free Length:40mm/1.57inch.-Made of metal material, nickel plated surface treatment, wear-resistant, more durable.-Tension spring can be used in many occasions, such as production and assembly, experiment, research and development, maintenance, etc.-Widely used for furniture, appliances, gate, screen doors and repair projects.-WIth dual hooks, the tension spring can be easily attached to drawstrings, tension belts, carabiners and other eyelets.Package:15x Compressed SpringItem Specifications:Type:Dual hookMaterial:MetalWire Diameter:1.0mm/0.04inchOuter Diameter:10mm/0.39inchFree Length:40mm/1.57inch