Diamond Manufacturing is a wholly owned subsidiary of Reliance, Inc., specializing in perforating and fabricating metal products. With over 50 machines on-site, Diamond can perforate more than 4,000 patterns at tight tolerances. They offer a complete solution from material to finished product, serving volume OEM buyers, local job shops, and architects across six locations in the United States. Diamond Manufacturing is a leading perforator of metals in North America, providing custom engineering and fabrication services to meet a wide range of customer needs.