GKI Incorporated, a Crystal Lake, Illinois manufacturing company, is celebrating its 40th anniversary. The company specializes in metal cutting products and services used in various industries throughout North America. It currently serves Fortune 500 manufacturing companies including Caterpillar, Boeing, Ford, Chrysler, Nissan, General Electric and others. GKI was recognized as one of the fastest growing companies in America by Inc. Magazine in 2007 and 2008. The company currently employs 50 people in its facility in Crystal Lake, and has sales offices in Philadelphia, Pennsylvania, and Nashville, Tennessee. The company was founded by Gerhard Klutke, who immigrated to the United States from Germany in 1964 and started GKI in the garage of his home in 1971. Today, GKI is run by his sons, Olaf Klutke, president, and Eric Klutke, vice president.