Ryerson Holding Corporation is a value-added processor and distributor of industrial metals. The Company, through its metals service centers segment, provides value-added processing and distribution of industrial metals with operations in the United States, Canada, Mexico, and China. It purchases large quantities of metal products from primary producers and sells these materials in smaller quantities to a range of metals-consuming industries. It carries a line of approximately 75,000 products in stainless steel, aluminum, carbon steel, and alloy steels and a line of nickel and red metals in various shapes and forms. Its subsidiaries include JT Ryerson in the United States; Ryerson Canada, Inc., in Canada and Ryerson Metals de Mexico, S. de R.L. de C.V., in Mexico. In addition to its North American operations, it conducts materials processing and distribution operations in China through its wholly owned subsidiary, Ryerson China Limited. It is also engaged in tool steel processing.