Gardner Bender Sperry Instruments CT6101 Heavy Duty Continuity Tester, 2 Range, 36 inch lead

This is an *actual* continuity tester (not like those $1 - $3 ones that only test energized wires). This one works on non-energized wires. I use it all the time when installing GFCI outlets to see which wire is for LINE and which is for LOAD when the guy before me hasn't notched the wires. Since the white wire is connected to ground in the panel, whichever 14/2 has continuity between white and ground is the LINE. A multimeter would work too, but this is far more convenient and doubles as a voltage detector.

This is a must have for working on electronics. I purchased it to identify and determine continuity for the abs system on my vehicle. Within minutes I had identified two broken circuits (and was able to fix the problem). I'm sure many of you reading this will have a multimeter that gives an audible continuity check, but I found it difficult to use in certain situations. This tool does one thing, but does it really well. There's no audible indication of a complete d circuit, but I find the light to work great and is not annoying like the beep on the multimeter, especially if you're using it for multiple circuits. The design is perfect. An all-in-line design makes testing hard to reach wires quick and easy to test. The price can't be beat and it arrived within two days of order. I'm upset with myself that I hadn't purchased one sooner. I can think of many situations where it would have made the job much easier. If you're looking at it, you probably need it. Buy it, you won't regret it. Very sturdy design, superb quality build and materials. The only thing I would modify would be the light itself, it's a soft white. I prefer the cooler (bluer) color temperature of LEDs, but that a personal preference.

Worked fine and no issues

Excellent. Make sure you have a spare bulb, though. Pricey.

works great for my job