Profile: Diamond Perforated Metals, Inc. is a manufacturer and distributor of perforated and expanded metals. Our services include blanket contract service, toll processing, degreasing , PVC coating, shear to size, notching and bolt holes. We provide custom patterns for perforated metals. We have regular expanded metal sheet, which is simultaneously slit and stretched into a rigid, non-raveling open mesh and readily available in carbon steel, aluminum and stainless steel, flattened and expanded metal is manufactured by processing regular expanded metal in a rolling mill, expanded metal grating, which is produced from heavier plate, usually low-carbon steel, with larger diamonds. Our products are typically used for walkways and platforms and decorative expanded metal that is manufactured with unique shaped openings which possess great appeal for architects. We are an ISO 9001-2000 certified company.