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phoinix | Staff 14.3K Views
Apr 1, 2026 5:48 PM

Klein Tools Non-Contact Voltage/GFCI Receptacle Electrical Tester Pen Kit

$20

$27

25% off
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Deal Details
Amazon has Klein Tools Non-Contact Voltage and GFCI Receptacle Electrical Tester Pen Kit (NCVT1PKIT) on sale for $19.98. Shipping is free w/ Prime or on $35+ orders.

Alternatively, Lowe's has Klein Tools Non-Contact Voltage and GFCI Receptacle Electrical Tester Pen Kit (NCVT1PKIT) on sale for $19.98. Shipping is free on for MyLowe's Rewards Members (free to join), or choose curbside pickup where stock permits.
  • Note: Availability for pickup may vary by location.
Thanks to Deal Hunter phoinix and Community Member tunabreath [Discuss] for sharing this deal
About this product:
  • Test kit with NCVT1P and RT205 testers
  • 50-1000V AC non-contact voltage detection
  • LED and audible alerts for voltage presence
  • GFCI tester detects common wiring faults
  • Includes batteries and instructions

Editor's Notes

Written by Discombobulated | Staff
  • About this Store:
  • Additional Information:
    • This offer matches our very popular front page deal from February 2026 which earned over 65 thumbs up
    • Product is eligible for refund/replacement within 30-days of purchase

Original Post

Written by phoinix | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has Klein Tools Non-Contact Voltage and GFCI Receptacle Electrical Tester Pen Kit (NCVT1PKIT) on sale for $19.98. Shipping is free w/ Prime or on $35+ orders.

Alternatively, Lowe's has Klein Tools Non-Contact Voltage and GFCI Receptacle Electrical Tester Pen Kit (NCVT1PKIT) on sale for $19.98. Shipping is free on for MyLowe's Rewards Members (free to join), or choose curbside pickup where stock permits.
  • Note: Availability for pickup may vary by location.
Thanks to Deal Hunter phoinix and Community Member tunabreath [Discuss] for sharing this deal
About this product:
  • Test kit with NCVT1P and RT205 testers
  • 50-1000V AC non-contact voltage detection
  • LED and audible alerts for voltage presence
  • GFCI tester detects common wiring faults
  • Includes batteries and instructions

Editor's Notes

Written by Discombobulated | Staff
  • About this Store:
  • Additional Information:
    • This offer matches our very popular front page deal from February 2026 which earned over 65 thumbs up
    • Product is eligible for refund/replacement within 30-days of purchase

Original Post

Written by phoinix | Staff

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Top Comments

lazzlazz
2.6KComments
527Reputation
This is a good option, but also use the old fashioned, non-battery circuit tester. Never trust just one option when you're testing for electricity.

Also, when you use this, test it on an outlet that you know is on, to make sure that it is working properly, then test it on the outlet that you think has been turned off.


If you plan to do more DIY in your house and want to spend more, something like the Klein Digital Circuit Breaker finder is excellent for figuring out what circuit a given electrical outlet/switch is connected to in your panel. It can save you a lot of running up and down stairs, or shouting to someone at the circuit box, if the circuits are not well labeled in a house.
"The Klein Tools ET310 Circuit Breaker Finder with Integrated GFCI Outlet Tester is a digital circuit breaker finder used to locate the correct circuit breaker in a panel to which an electrical outlet or fixture is connected. "
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Community Reviews

This Klein combo pairs a non contact voltage pen with a plug in outlet and GFCI tester, making it useful for checking whether wires are live and whether receptacles are wired correctly. The pen is handy for electrical work, especially before touching ceiling fans or other circuits, and the set has held up better than other brands. The main caveat is that the pen still needs its prong inserted into the outlet, and the combo can be found much cheaper as separate tools or with coupons. A practical safety kit if you want both functions in one package.

Common Questions (5)

AI-generated summary based on comments from the community. Updated ago

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22 Comments

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Apr 2, 2026 12:50 PM
14 Comments
Joined Dec 2025
SoreDikDealApr 2, 2026 12:50 PM
14 Comments
I was confused using mine initially because it said no contact, till I realized you have to put the prong into the outlet. In case anyone didn't know
2
1
Apr 2, 2026 12:58 PM
84 Comments
Joined Jun 2020
bstoker88Apr 2, 2026 12:58 PM
84 Comments
everyone needs a pair of these and they make great gifts too
Apr 2, 2026 12:58 PM
1.8K Comments
Joined Apr 2004
VSevenApr 2, 2026 12:58 PM
1.8K Comments
Every home owner should have this. The only other one to look out for is a plug in tester that has a buzzer you can turn on so you can make it make noise and then turn off breakers until it's off. Back in the day you would plug in a radio and turn up the volume but nowadays everything is batteries.
Last edited by VSeven April 2, 2026 at 06:01 AM.
Apr 2, 2026 1:00 PM
240 Comments
Joined Dec 2010
tombyApr 2, 2026 1:00 PM
240 Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from SoreDikDeal View quoted comment :
I was confused using mine initially because it said no contact, till I realized you have to put the prong into the outlet. In case anyone didn't know
It's two separate tools. The pen-shaped one is the non-contact voltage detector, for seeing if outlets, wires, or switches are live. The plug-in tester confirms outlets are wired correctly.
1
Apr 2, 2026 1:06 PM
2.6K Comments
Joined Dec 2006
lazzlazzApr 2, 2026 1:06 PM
2.6K Comments

Our community has rated this post as helpful. If you agree, why not thank

This is a good option, but also use the old fashioned, non-battery circuit tester. Never trust just one option when you're testing for electricity.

Also, when you use this, test it on an outlet that you know is on, to make sure that it is working properly, then test it on the outlet that you think has been turned off.


If you plan to do more DIY in your house and want to spend more, something like the Klein Digital Circuit Breaker finder is excellent for figuring out what circuit a given electrical outlet/switch is connected to in your panel. It can save you a lot of running up and down stairs, or shouting to someone at the circuit box, if the circuits are not well labeled in a house.
"The Klein Tools ET310 Circuit Breaker Finder with Integrated GFCI Outlet Tester is a digital circuit breaker finder used to locate the correct circuit breaker in a panel to which an electrical outlet or fixture is connected. "
3
Apr 2, 2026 1:36 PM
33 Comments
Joined Mar 2026
CalmMustang2455Apr 2, 2026 1:36 PM
33 Comments
Great tool!
Apr 2, 2026 2:09 PM
380 Comments
Joined Jul 2006
gmorphisApr 2, 2026 2:09 PM
380 Comments
I use the pen hanging ceiling fans and it saved me at least the shock of my life, I had accidentally left the breaker on but fortunately I was using that pen to test the wires. I'll buy this set and give the pen away. I don't have the other tool. Thanks!

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Apr 2, 2026 2:42 PM
519 Comments
Joined May 2018
1n4oneApr 2, 2026 2:42 PM
519 Comments
Quote from VSeven View quoted comment :
Every home owner should have this. The only other one to look out for is a plug in tester that has a buzzer you can turn on so you can make it make noise and then turn off breakers until it's off. Back in the day you would plug in a radio and turn up the volume but nowadays everything is batteries.
Correct me if I'm wrong, but if you plug in the outlet tester in a non-GFCI outlet, and hit the button on the device, wouldn't it kill the breaker for that circuit?
Apr 2, 2026 3:21 PM
72 Comments
Joined Jun 2014
DrEldarionApr 2, 2026 3:21 PM
72 Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from gmorphis View quoted comment :
I use the pen hanging ceiling fans and it saved me at least the shock of my life, I had accidentally left the breaker on but fortunately I was using that pen to test the wires. I'll buy this set and give the pen away. I don't have the other tool. Thanks!
I was taught to test both before and after turning off the breaker. Before to make sure the tool is working and you're using it correctly on the wires, after to actually make sure the power is off.
2
Apr 2, 2026 3:34 PM
1.8K Comments
Joined Apr 2004
VSevenApr 2, 2026 3:34 PM
1.8K Comments
Quote from 1n4one View quoted comment :
Correct me if I'm wrong, but if you plug in the outlet tester in a non-GFCI outlet, and hit the button on the device, wouldn't it kill the breaker for that circuit?
You'd think so but no. The tester makes a very small imbalance between hot and ground. It's not a true short which would be unsafe. It shouldn't trip a actual breaker.

With that said it will trip a upstream GFCI, which should happen if the upstream one is working properly.
1
Apr 2, 2026 5:43 PM
311 Comments
Joined Apr 2013
dealballs1989Apr 2, 2026 5:43 PM
311 Comments
Quote from SoreDikDeal View quoted comment :
I was confused using mine initially because it said no contact, till I realized you have to put the prong into the outlet. In case anyone didn't know
the prong goes in the outlet, son
Apr 2, 2026 6:05 PM
10.1K Comments
Joined Jun 2007
DrRadApr 2, 2026 6:05 PM
10.1K Comments
$5 voltage tester and $7 outlet at Harbor Freight. Even cheaper combined with coupon.

Might as well throw in a $8 multimeter.

This is a horrible deal.
Last edited by DrRad April 2, 2026 at 08:04 PM.
1
5
Apr 2, 2026 6:06 PM
2.6K Comments
Joined Dec 2006
lazzlazzApr 2, 2026 6:06 PM
2.6K Comments
Quote from gmorphis View quoted comment :
I use the pen hanging ceiling fans and it saved me at least the shock of my life, I had accidentally left the breaker on but fortunately I was using that pen to test the wires. I'll buy this set and give the pen away. I don't have the other tool. Thanks!
You should be able to find the GFCI tester tool individually, for much cheaper. You don't need to buy this combo.
Apr 2, 2026 7:00 PM
5 Comments
Joined Sep 2023
HilariousOstrich870Apr 2, 2026 7:00 PM
5 Comments
Quote from VSeven View quoted comment :
Every home owner should have this. The only other one to look out for is a plug in tester that has a buzzer you can turn on so you can make it make noise and then turn off breakers until it's off. Back in the day you would plug in a radio and turn up the volume but nowadays everything is batteries.
I use a vacuum!

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Apr 2, 2026 9:47 PM
1.1K Comments
Joined Feb 2012
yakkyApr 2, 2026 9:47 PM
1.1K Comments
The pen tester is great, really worth having if you do any electrical work. Great to double check that wires are really dead before starting work.

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