The FLUKE 1630 Earth Ground Clamp is a high-quality current calibrator manufactured by Fluke in the United States. This unit is essential for accurately measuring and verifying the continuity and resistance of earth ground systems. With a single unit included in the package, this product is ideal for professionals in various industries who require precise calibration for their equipment and tools. The FLUKE 1630 Earth Ground Clamp ensures reliable and accurate measurements, making it a valuable addition to any workshop or laboratory.