The Klein Tools Receptacle Tester is an essential diagnostic tool for professional electricians and contractors who need fast, reliable wiring verification on the job site. Designed to detect the most common wiring faults in standard and GFCI receptacles, this tester takes the guesswork out of outlet troubleshooting — saving time and reducing callbacks. A convenient built-in chart lets you instantly interpret light patterns to identify conditions such as open ground, reverse polarity, open hot, open neutral, and hot/ground reversed. Rated to CAT II 300V and built with 6.6 ft (2 m) drop protection, it's engineered to handle the demands of daily trade use.

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