Fluke 1625-2 GEO Earth Ground Tester Kit The Fluke 1625-2 is a unique earth ground tester that can perform all four types of earth ground measurement: 3- and 4-Pole Fall-of-Potential (using stakes) 4-Pole Soil Resistivity testing (using stakes) Selective testing (using 1 clamp and stakes) Stakeless testing (using 2 clamps only) Adjustable limits - for quicker testing IP56 rated for outdoor use Rugged carrying case www.fluke.com/en/product/electrical-testing/earth-ground/fluke-1625-2-kit