Klein Tools ET310KIT AC Circuit Breaker Finder Kit, Electric Tester, GFCI Tester, Leads, Adapters and Case
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Availability:
In Stock.
Arrives
Thursday, Aug 6
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Size: 3-Piece Kit
Features
- ACCURATE CIRCUIT BREAKER IDENTIFICATION: Quickly locate the correct breaker with precision using the transmitter and receiver of the circuit breaker finder, ensuring efficient electrical troubleshooting
- CLEAR INDICATIONS: The Receiver provides visual and audible cues when the correct breaker is found, ensuring a hassle-free locating process on 90-120V AC circuits
- BUILT-IN GFCI TESTER: The Transmitter includes a GFCI outlet tester, enabling you to inspect wiring conditions and test GFCI devices for added safety
- LIGHT SOCKET AND GROUNDING ADAPTERS: Easily find the correct circuit for a lighting fixture with the light socket adapter, and use the included 3-prong to 2-prong grounding adapter for added convenience
- ALLIGATOR CLIP ADAPTER: Enables testing on bare wires, providing versatile usage options
Description
The Circuit Breaker Finder Kit includes components for various 90-120V AC circuit diagnostics. The receiver locates the correct breaker for outlets or fixtures, and the transmitter can connect to other fixtures using the included accessories. Use the transmitter with the alligator clip adapter for bare wires and the light socket adapter to locate the correct circuits. The transmitter also tests GFCI outlets. Components are stored in a premium carrying case with a foam insert for organization.
Brand: KLEIN TOOLS
Power Source: Battery Powered
Style: 3-Piece Kit
Color: Orange
Item Weight: 0.56 kg
Power Source: Battery Powered
Minimum Operating Voltage: 90 volts
Compatible Devices: Transmitter, Receiver, Electrical devices, Wiring
Style Name: 3-Piece Kit
Color: Orange
Item Weight: 0.56 kg
Item Dimensions: 10.96 x 2.17 x 1.41 inches
Specification Met: Catii 120v
Brand Name: KLEIN TOOLS
Model: ET310KIT
Unit Count: 1 Count
UPC: 092644694929
Warranty Description: Call vendor for warranty
Manufacturer: Klein Tools
Included Components: Circuit Breaker Finder Kit
Part Number: ET310KIT
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Aug 6
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 3-Piece Kit
This is honestly a fantastic tool, and I couldn’t be more impressed with its performance. One of the standout moments for me was when I was trying to locate an unknown breaker in a breaker panel—something that can be a real hassle, especially if you don't have the right tools. This tool made the process so much quicker and easier. What would’ve been a guessing game or a time-consuming trial-and-error process turned into something almost effortless. Not only did it help me find the correct breaker without any headache, but it also made me look like I actually knew what I was doing—always a plus when you're trying to impress friends, family, or clients! I’ve only scratched the surface in terms of using all the tool’s functions, but even just using it for this one task, it paid for itself. Honestly, after that experience, I knew I’d gotten my money’s worth. The fact that it saved me so much time and frustration made it a solid investment right from the get-go. It’s one of those tools that you don’t realize how much you need until you use it—and then you wonder how you ever managed without it. While I’d highly recommend this tool to DIYers—especially if you’re someone who enjoys working on electrical projects or home repairs—it’s definitely versatile enough to be useful for professionals as well. Whether you’re just dabbling in home improvement or you’re a seasoned expert, this tool offers enough reliability and functionality to make it a handy addition to anyone’s toolbox. In short, if you’re on the fence about it, don’t be. Even if you just need it for a single task (like I did), you’ll quickly see that it’s worth the investment. Plus, it’ll definitely make you look a lot more competent than you might feel in the moment—always a nice bonus!
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Reviewed in the United States on October 14, 2025 by Brother bear
Size: 3-Piece Kit
Klein hit the nail on the head with this product. Very affordable product for what it does. Light indicators check wiring accuracy, GFCI test works great. Find the breaker you need easily with one person. The kit comes with a light bulb socket adapter, alligator clips for bare wire, and a 2 prong adapter. Carrying case seems heavy duty and durable. Overall great product, easy to use, and quality built.
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Reviewed in the United States on March 25, 2026 by K&L ROBERTS
Size: 2-Piece Kit
This kit makes it much easier to identify the correct circuit breaker without repeatedly walking back and forth to the panel. The transmitter and receiver are simple to use, and the breaker finder has been accurate in normal residential and light commercial work. The included outlet tester and accessories make the set even more useful for troubleshooting. It is a practical, well-built kit that saves time and takes the guesswork out of circuit identification.
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Reviewed in the United States on July 15, 2026 by Daniel
Size: 2-Piece Kit
I picked this up primarily for projects around the house like replacing outlets and doing minor electrical work, and it has performed exactly as expected. The breaker finder makes it quick and easy to identify the correct circuit without the usual trial and error of flipping breakers back and forth. It consistently detected the right breaker during my testing, which saves a lot of time and frustration. One unexpected bonus was the included bulb socket to outlet adapter. I actually used it while traveling when a condo balcony didn’t have an accessible outlet, and it ended up being incredibly useful. That kind of versatility makes this kit more valuable than it might seem at first glance. Build quality is what I expect from Klein — solid, durable, and dependable. Klein has always been one of my go-to brands for electrical tools, and this kit reinforces that reputation. Everything feels well made and designed for real-world use rather than occasional DIY novelty. The tool is straightforward to operate with no learning curve, and it’s compact enough that I’ve added it to my everyday carry tool kit for home maintenance. Honestly, I don’t have any negatives to call out. If you do electrical work around the home even occasionally, this is one of those tools that quickly pays for itself in convenience.
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Reviewed in the United States on February 21, 2026 by Rajvi Sandiford
Size: 2-Piece Kit
The Klein Tools ET310 Circuit Breaker Finder and GFCI Tester are essential tools for any electrician or homeowner. Its advanced features and ease of use streamline electrical troubleshooting. Reliable Circuit Tracing: Using professional tone technology, the ET310 accurately traces circuits and identifies breakers. It effectively locates breakers on Cutler Hammer CH panels, even with the front cover on. Multipurpose Functionality: Beyond circuit tracing, the ET310 also functions as a receptacle polarity, ground tester, and GFCI tester. This versatility makes it an invaluable multipurpose tool. Accessory Pack Convenience: The included pack enhances the EET310'sfunctionality with an Edison-base light bulb socket adapter, a 2-prong adapter for non-grounded receptacles, and an adapter for wire connections. Portable and Easy to Use: The EET310'scompact and lightweight design makes it convenient to carry and use. Its clear display and intuitive controls allow for hassle-free operation. Conclusion: Overall, the Klein Tools ET310 Circuit Breaker Finder and GFCI Tester is highly reliable and versatile, simplifying electrical troubleshooting. Its advanced features, easy use, and affordable price make it a must-have for any electrician or homeowner seeking an effective and efficient circuit tracing solution.
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Reviewed in the United States on September 5, 2024 by Lisa G.
Size: 3-Piece Kit
I have always liked Klein electric tool, because they just work. Had a heck of a time locating a circuit breaker, my house has a huge panel box and 3 sub boxes. At first, I decided to save some money and get a different less expensive breaker finder. To be completely honest, I thought it was Klein because it was the same color, which is on me. That device did not work, keep showing false positives on the same 3 breakers no matter what outlet I had the tester/transponder plugged into. Even when I knew exactly what breaker it was, the other devices failed to recognize it. Tried and tried over and over with the same false positive results. So, I decided to spend the extra money, which in hindsight was only another $15, and purchase this set. Bonus, this set came with a lot more plus the case for another $5, which is well worth it. I could now not only test outlets to make more they were wired correctly, but also test and trace breakers with outlets, two pongs, light socket and live exposed wires. Very nice. To test the breaker finder functionality, I plugged the tester/transmitter into a random outlet and confirmed it was wired correctly, which it was. Went downstairs, turned on the breaker finder, "the wand", on my way because I read to do this away from the panel box. Once I got to the box, I ran the wand down the breakers- top to bottom- left to right- first one row and then the other, ignoring the beeping and lights. This apparently learns the breakers, gets an ideal of what's up. Started the process over again and the wand went berserk on the very last breaker- short increased beeping with a red light- over a double 15-amp breaker. I did not think this was the correct breaker at all because it was a different breaker than the other outlets in the room that I knew of. Said to myself, here we go again, another defective unit that doesn't work, thanks Klein, had high hopes for you, you never let me down before. Held the wand away, reset it and ran the test again, showed the exact same breaker, the very last one in the box, double 15 amp and it even told me it was the top 15-amp switch, not the bottom 15. I reluctantly flipped that breaker off, more out of spite than anything and went upstairs to see what clocks I need to reset and where. MUCH to my surprise, the tester plugged into the outlet was off, no "correct wiring" lights or anything. Humm, must have turned itself off, which didn't make sense since it gets it power from the outlet, so I took it out and plugged it back in and ALAS no power! That was the exact correct breaker! I should have never doubted my buddy Klein!
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Reviewed in the United States on June 20, 2025 by Marshal
Size: 3-Piece Kit
Fast delivery. Looks good, nice case!! Even came with the required 9 volt battery! Klein makes nice electrical tools!! Tried it out within minutes of delivery! Works great!! Nice tool!!
Reviewed in the United States on July 9, 2026 by RHJ
Size: 3-Piece Kit
A life saver tracing circuits on our rewiring project where everything seemed to be on one breaker
Reviewed in the United States on June 27, 2026 by connie