General Tools and Instruments Co. a manufacturer of electronic testing and measurement equipment was founded in New York city in 1922. General Tools product line include precision measuring tools and instruments, and other specialty hand tools.

General Tools acquire Mannix Instruments to broaden the line of test equipment and measurement testers in November 2006.

General Tools is a manufacturer of high quality tools to professional and home users for more than 85 years. General Tools products are carried by most reputable retailers around the world, including Home Depot, Lowes and Ace Hardware.