Klein Tools, Inc. was founded in 1857 by German immigrant Mathias Klein in Chicago, Illinois, and has since become a premier manufacturer of professional hand tools and occupational protective equipment. Headquartered in Lincolnshire, Illinois, the company remains a family-owned business, now led by the fifth and sixth generations of the Klein family. Klein Tools primarily serves the electrical, construction, and maintenance industries, emphasizing quality, durability, and innovation. Its extensive product portfolio includes pliers, screwdrivers, nut drivers, wrenches, wire strippers, crimpers, cable cutters, and a wide range of test and measurement instruments. The company also offers tool storage solutions such as tool bags, belts, and buckets, along with personal protective equipment including gloves, eyewear, and hard hats. Notable product series include the Journeyman™ line featuring high-leverage pliers with ergonomic grips, and the VDV (Voice-Data-Video) series for low-voltage applications. With over 165 years of history, Klein Tools is recognized as the preferred brand among professional electricians across North America. The company maintains multiple U.S. manufacturing facilities, underscoring its commitment to American production. Klein Tools holds a dominant market share in the professional electrician tool segment and is widely respected for its craftsmanship and reliability.