... punching,stamping,bending, welding ISO9001; ISO14000 Name Mortise door lock hotel safe Item No. TP030820MaterialSECC, stainless steelProcessstamping, ... alloy,red copper,brass, bronze alloy are availableSurface treatmentplating, Zinc plating, enamel, hot-dip, polishing, hardening clear ... anodizing, chrome plating, nickel plating, zinc plating, oil injection, black oxide coating and so ...