Gardner Bender Stop Shock II GFCI Outlet Circuit Analyzer Tester, Detects Low Resistance Brand_Behrens Lock may be opened by

Lock may be opened by and emergency entry key in exterior knob

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Gardner Bender Stop Shock II GFCI Outlet Circuit Analyzer Tester, Detects Low Resistance Brand_Behrens Lock may be opened byThe Stop Shock II Circuit Analyzer makes it easy to test GFCI receptacles and determine the appropriate wiring correction needed. This GFCI tester uses advanced circuitry and a patent pending proprietary design to precisely detect the required low resistance (less than 10ohms) on ground wire and provides a clear and easy to understand single LED readout indication for correct wiring or Bad Ground, Open Neutral, Hot GND Reverse, Hot NEU Reverse and