Fluke ES-162P3 Stake Set. A604510302, for 3 pole measurment. Mfg part Fluke 2577091. Fluke parts and accessories. Needed to perform 3-Pole Fall of Potential testing (Stake testing) Used with both the Fluke 1623 and Fluke 1625. This is a subset of what is included in the Fluke 1625 Kit.