... metal part punching,stamping,bending, welding ISO9001; ISO14000 Name One way door locks Item No. TP030817MaterialSECC, stainless steelProcessstamping,punching,bending, ... a series of metal sheet part for 8 yearsMaterialstainless steel, iron ( SPCC, SECC, SPTE, tinplate), aluminum alloy,red copper,brass, ... Punching & Riveting workshop # Warehouse # Carton package # Wood package # Mold One way door locks