... ~5CM 3.Wire die:1.0~3.0mm Promotion Steel key ringFeatures: 1) Wire Diameter: 1.0~ 3.0mm 2) Type ... : Key ring. 3) Main material: carbon spring steel, steel, stainless steel, ... spring, steel spring, hook spring, furniture spring, industrial spring, car/vehicle spring, auto spring, machine spring,wire spring, coiled spring, cylinder spring ...