Woodhead testers are small devices that perform basic verification and multi-function wire testing with compact, simple-to-use devices that are a must for any toolbox. Woodhead testers testing abilities include reverse polarity, open- ground, open-neutral, open-hot, hot-and-ground-reversed, hot-on-neutral, hot-unwired, Ground Fault Circuit Interrupter (GFCI) functional and receptacle tension. The plug-in design enables a quick read; go versus no-go indication, the vulcanized rubber construction delivers optimum resistance to the effects of heat, cold, abrasion and chemicals, and the wide variety of tooling capabilities provides customer convenience.