... Product appearance. Mechanical wire, straight, molding all adopt high quality alloy steel, and through the vacuum heat-treatment, ... , the treatment weeken, make its mechanical properties of high, Teeth by forging pei, the nonylphenol piece. ModelDiameter ... 2.2HFR43We also produce hanger making machine, chain bending machine,chain welding machine,ring making machine,etc. Full automatic twist wire hanger ...