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phoinix | Staff 13.4K Views
Oct 18, 2025 7:11 AM

Klein Tools Digital Multimeter Electrical Tester Set

$50

$60

16% off
+ Free Shippingat Amazon
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Deal Details
Amazon has Klein Tools Digital Multimeter Electrical Tester Set (MM320KIT) on sale for $49.49. Shipping is free.

Home Depot has Klein Tools Digital Multimeter Electrical Tester Set (MM320KIT) on sale for $49.49. Shipping is free or select free ship-to-store pickup where available.

Thanks to Deal Hunter phoinix for finding this deal.
  • Note: Availability for pickup may vary by location.
Includes:
  • MM320 Digital Multi-meter (Measures up to 600-Volt AC/DC voltage, 10 A DC current and 2MΩ resistance)
  • NCVT-3P Non-Contact Voltage Tester with Flashlight
  • ET45 Voltage Tester
  • RT210 GFCI Receptacle Tester
  • A padded storage pouch and all required batteries

Editor's Notes

Written by RevOne | Staff
  • About this deal:
    • Please see original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this product:
    • 2 year warranty
  • About this store:

Original Post

Written by phoinix | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has Klein Tools Digital Multimeter Electrical Tester Set (MM320KIT) on sale for $49.49. Shipping is free.

Home Depot has Klein Tools Digital Multimeter Electrical Tester Set (MM320KIT) on sale for $49.49. Shipping is free or select free ship-to-store pickup where available.

Thanks to Deal Hunter phoinix for finding this deal.
  • Note: Availability for pickup may vary by location.
Includes:
  • MM320 Digital Multi-meter (Measures up to 600-Volt AC/DC voltage, 10 A DC current and 2MΩ resistance)
  • NCVT-3P Non-Contact Voltage Tester with Flashlight
  • ET45 Voltage Tester
  • RT210 GFCI Receptacle Tester
  • A padded storage pouch and all required batteries

Editor's Notes

Written by RevOne | Staff
  • About this deal:
    • Please see original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this product:
    • 2 year warranty
  • About this store:

Original Post

Written by phoinix | Staff

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16 Comments

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Oct 18, 2025 2:05 PM
53 Comments
Joined Mar 2020
Benito_CameloOct 18, 2025 2:05 PM
53 Comments
HD has the same price, not a sale MM320KIT

Oct 18, 2025 2:38 PM
148 Comments
Joined Jan 2016
yivekOct 18, 2025 2:38 PM
148 Comments

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

For any handy DIY home owners in a warmer climates, I didn't buy this one as a gift for my brother because it doesn't do capacitor testing.

AC units can have capacitors that go bad and it's a fairly cheap part to buy and replace yourself. Versus an AC repair person that's typically over $100 for the visit and then whenever they want to charge you for the capacitor on your AC, that isn't working.
I have a Klein volt meter, a step above this that does capacitor testing and I was able to save myself a AC repair person visit and put a new capacitor in for $35.

My AC wasn't kicking on the compressor and it was due to an old capacitor. I was able to fix it with a voltmeter, a YouTube video and a screw driver.
3
Oct 18, 2025 4:27 PM
236 Comments
Joined Jun 2007
CahlheimOct 18, 2025 4:27 PM
236 Comments

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

Quote from yivek View quoted comment :
For any handy DIY home owners in a warmer climates, I didn't buy this one as a gift for my brother because it doesn't do capacitor testing.

AC units can have capacitors that go bad and it's a fairly cheap part to buy and replace yourself. Versus an AC repair person that's typically over $100 for the visit and then whenever they want to charge you for the capacitor on your AC, that isn't working.
I have a Klein volt meter, a step above this that does capacitor testing and I was able to save myself a AC repair person visit and put a new capacitor in for $35.

My AC wasn't kicking on the compressor and it was due to an old capacitor. I was able to fix it with a voltmeter, a YouTube video and a screw driver.
I keep a spare cap on hand just for this situation.
1
Oct 18, 2025 4:46 PM
77 Comments
Joined Jul 2017
1ronhallOct 18, 2025 4:46 PM
77 Comments
Quote from Cahlheim View quoted comment :
I keep a spare cap on hand just for this situation.
As do I!
2
Oct 19, 2025 12:50 AM
130 Comments
Joined Nov 2009
Somnus1Oct 19, 2025 12:50 AM
130 Comments
Quote from Cahlheim View quoted comment :
I keep a spare cap on hand just for this situation.
Me too! I see that bulge in the top and replace the cap. So inexpensive.
2
Oct 20, 2025 4:34 PM
1 Comments
Joined Sep 2024
NeatApparel1975Oct 20, 2025 4:34 PM
1 Comments
Quote from yivek View quoted comment :
For any handy DIY home owners in a warmer climates, I didn't buy this one as a gift for my brother because it doesn't do capacitor testing.

AC units can have capacitors that go bad and it's a fairly cheap part to buy and replace yourself. Versus an AC repair person that's typically over $100 for the visit and then whenever they want to charge you for the capacitor on your AC, that isn't working.
I have a Klein volt meter, a step above this that does capacitor testing and I was able to save myself a AC repair person visit and put a new capacitor in for $35.

My AC wasn't kicking on the compressor and it was due to an old capacitor. I was able to fix it with a voltmeter, a YouTube video and a screw driver.
Can you provide the model number or Amazon link that includes capacitor testing? Thank you.
Oct 20, 2025 5:03 PM
1.5K Comments
Joined Jun 2006
s4rahOct 20, 2025 5:03 PM
1.5K Comments
How is this a "Hot Deal"? It's almost aways this price.

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Oct 21, 2025 2:46 PM
999 Comments
Joined Nov 2010
everica1Oct 21, 2025 2:46 PM
999 Comments
Quote from NeatApparel1975 View quoted comment :
Can you provide the model number or Amazon link that includes capacitor testing? Thank you.
I bought the MM420 earlier this year from Amazon specifically because it featured the capacitor testing since my old trusty Radio Shack DMM didn't have it.

Definitely pay the $5 more for the MM420 to get the added capacitance testing.
1
Oct 21, 2025 2:49 PM
999 Comments
Joined Nov 2010
everica1Oct 21, 2025 2:49 PM
999 Comments
Quote from s4rah View quoted comment :
How is this a "Hot Deal"? It's almost aways this price.
I agree.
This product hasn't been anywhere near the $60 MSRP since 2021. This is the everyday price. Must be a slow deal day on SD so they are just pushing anything now.
Oct 21, 2025 2:59 PM
3.7K Comments
Joined Jan 2011
WandOct 21, 2025 2:59 PM
3.7K Comments
It's been this price for good 3 months.
Oct 21, 2025 3:13 PM
523 Comments
Joined Dec 2018
shoka_conOct 21, 2025 3:13 PM
523 Comments
Quote from Benito_Camelo View quoted comment :
HD has the same price, not a sale MM320KIT
This is also the normal price at Amazon, and has been for a long time.
Oct 21, 2025 3:26 PM
219 Comments
Joined Mar 2017
BellmarOct 21, 2025 3:26 PM
219 Comments
Quote from Cahlheim View quoted comment :
I keep a spare cap on hand just for this situation.
Proactively replacing the blower fan cap, as well the codenser fan&compresser cap and relay are cheap ways to save good money on HVAC services.

That and cleaning your coils and lubing your fan bearings.

Even better, learn to press in new bearings. New fans can be 150+ tax and shipping.
Oct 21, 2025 6:04 PM
16.2K Comments
Joined Jan 2010
Ride_The_SkyOct 21, 2025 6:04 PM
16.2K Comments
Pay a bit more and get MM420
Oct 22, 2025 3:25 PM
161 Comments
Joined Dec 2013
rapdealsOct 22, 2025 3:25 PM
161 Comments
Quote from Ride_The_Sky View quoted comment :
Pay a bit more and get MM420
Any good amazon link please?

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Oct 22, 2025 6:05 PM
16.2K Comments
Joined Jan 2010
Ride_The_SkyOct 22, 2025 6:05 PM
16.2K Comments
Quote from rapdeals View quoted comment :
Any good amazon link please?
It's usually same price at Amazon, Home Depot and Lowe's just search for mm420. 👍I think it's out of stock at Amazon now. 2.5 months ago I paid $59 on Amazon. Usually around 65.
1

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