Precision Steel Warehouse, Inc is an ISO 9001:2008 certified steel service center, founded in 1940. Its products include low carbon sheet and strip, shim steel, flat wire, electrolytic tin plate, electro and hot dipped galvanized, galvannealed, high carbon spring steel, stainless steel, and some copper base alloys, including phosphor bronze and brass strips. It has slitting lines from 8" to 60" capable of slitting .001 to .187 thick, in widths from 3/32" to 60" depending on thickness. PSW provides additional services such as sheet shearing, edging, and oscillating. The company is based in Franklin Park, IL, with a second branch in Charlotte, NC. Precision Steel Warehouse, Inc is a Berkshire Hathaway company.