... , brass, copper, alloy steel, aluminum, cold rolled steel with various plating3Surface treatmentMany kinds of plating (Zinc, Nikel, Chrome, ... Silkscreen, Heat treatment4SpecificationOEM service as per customers' requirements, with in-house tooling design and fabricating(Smoothness, without burrs ... to cooperate with you ! If there is a chance, welcome to our factory at any time! custom door lock parts ...