1. material : DC03 2. specification : M6 3. surface: Zinc-nickel alloy 4. completion : pressing 1. Material: stainless steel, iron, copper, aluminum, carbon steel2 Surface treatment: nickel, white zinc, blue zinc, color zinc, yellow zinc, black zinc, chrome3. Size: all sizes4. The use of this product is very broad, can be used for cars, all kinds of kitchen utensils, agricultural machinery and ...