Klein Tools RT200 GFCI Receptacle Tester
The Klein RT200 GCFI Receptacle Tester is designed to detect the most common wiring problems in standard receptacles. The tester can detect conditions such as wiring correct, open ground, reverse polarity, open hot, open neutral and hot/ground reversed.  However it cannot detect quality of ground, multiple hot wires, combinations of defects, reversal of grounded and grounding conductors. Since 1857, Klein Tools has manufactured the world's finest hand tools.  Today, Klein Tools is the 1 choice among professional tradesmen.  We manufacture more than 3,000 tools and accessories, including pliers, cable and bolt cutters, wire strippers, voice-data-video tools and testers, fish tapes, conduit benders, drill bits, insulated tools, gloves and many other high-quality products. Klein Tools' dedication to quality and innovation continues with products available for professional tradesmen worldwide.