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Klein Tools, Inc. launched five new interchangeable Multi-Bit Screwdriver/Nut Drivers using end-user research to address specific job-site issues. For more than 150 years, Klein® has manufactured premier Screwdrivers and Nut Drivers. We now produce the most versatile interchangeable Multi-Bit Screwdriver/Nut Driver product line that features the superior quality of Klein Tools, the strength that professionals depend on and the convenience of multiple functions in each tool.