Klein Tools CL390 AC/DC Digital Clamp Meter

Klein Tools is an iconic American brand with a legacy dating back to 1857. Founded by Mathias Klein in Chicago, the company built its reputation on manufacturing high-quality hand tools specifically for professional tradespeople, particularly linemen and electricians. While the brand is synonymous with American manufacturing for its classic hand tools like pliers, many of its modern electronic diagnostic instruments, such as the CL390 Clamp Meter, are manufactured in China to meet global supply chain requirements while maintaining the company's rigorous engineering specifications.

Ownership of the brand remains private and family-controlled. Since its inception, Klein Tools has been passed down through generations of the Klein family, ensuring that the company maintains its long-term focus on the professional tool market without the pressures of public shareholders. Today, the brand operates as a global leader in the electrical industry, managed by the fifth and sixth generations of the founding family from its headquarters in Lincolnshire, Illinois.