Hengda is a full service manufacturer of sheet metal via processing of perforating, also expanded metal and fabricated perforated metal products for various uses. Perforated metal is a kind of sheet metal usually made with styles of perforating, embossing, slotting or checkered plates. The process of creating perforations is called perforating, which involves puncturing the workpiece (usually a thin metal sheet) with a tool. Slotted perforated metal is a sheet or coil of material made from met...