Model Number: AUTO-115 Key Specifications/Special Features: Automatic spring length directorWire diameter: 0.01 to 1.2mmVarious materials: music wire, carbon wire, stainless steelwire, copper and beryllium copper wirePitch changeableSpring diameter changeableAdvanced manufacturing and testing equipmentApplications: all kinds of cars, machines, electronic products,electric appliance, cameras, stationery, computers, power switches,home appliance, A/V equipment, hardware and plastic moulds, sportsequipment and gifts