... metal part punching,stamping,bending, welding ISO9001; ISO14000 Name Mortise door lock hotel safe Item No. TP030820MaterialSECC, stainless steelProcessstamping,punching,bending,riveting ... , iron ( SPCC, SECC, SPTE, tinplate), aluminum alloy,red copper,brass, bronze alloy are availableSurface treatmentplating, Zinc plating, enamel, hot-dip, polishing, hardening clear ...