Accurate Tool Company, 891 Fernhill Rd, West Chester, PA 19380, US

Pioneering the idea of interchangeable sockets and wrench handles in 1920, Snap-on Incorporated was originated as Snap-on Wrench Company. At that time, it marketed 10 sockets that would snap on to five interchangeable handles, a concept that revolutionized the tool industry. Snap-on Incorporated is a leading developer, manufacturer and marketer of tools and equipment for professional users. Its product lines include hand tools, power tools, automotive diagnostics equipment, shop equipment, tool storage products, automotive diagnostics software and other solutions for transportation, industrial, government, education, agricultural, construction and electrical applications. Its products are sold through the company s franchised dealer vans, direct sales and distributor and Internet channels. Founded in 1920, Snap-on is an S&P 500 company headquartered in Kenosha, Wis.