... steel door lock ISO9001 certificate metal OEM Material:stainless steel Weight:0.84kg Size:270*130*25mm Stainless steel door ... Welding,Spot Welding,Laser Welding for Different materials.4.Assembling:assembly lines for complex product5.Heat Treatment:Include ... making workshop,polishing workshop,hardware workshop,assembly workshop,power supply& machine maintain workshop,store and so on),excellent ...