| New Gardner Bender GFI-3501 Ground Fault Receptacle Tester & Circuit Analyzer Each The GB Gardner Bender GFI-3501 GFCI Outlet Tester is an informative device with a detailed readout to help you diagnose electrical issues. Its sequence of red and yellow lights are clearly labeled to help you on a variety of projects. This ground fault... more | | $14.43 FREE shipping go to store |