We make perforated metal products out stainless steel, galvanized steel and cold-rolled carbon steel. Perforated sheets can be produced from sheets providing options that include margins and blank areas, along with full perforation. A common way to produce perforated sheets is using coils. This method provides great flexibility in both design and handling. Perforated coils can be produced from coils, as well, which is generally faster than perforating sheets. http://www.perforatedsheet.net