1.Express Nail Anchors. 2.Size:M6-M8 . 3.Material:65# manganese steel ... steel, aluminum, cold rolled steel with various plating; 3) Surface treatment: kinds of plating (Zinc, Nikel, Chrome, Tin, Ag); Painting, Powder ... , Anodizing, E-coating, Silkscreen, Heat treatment, Black oxid; 4) Standard/ specification: OEM service as per customers ...