

⚡ Power up your toolkit with precision and safety—because every pro deserves the best!
The Klein Tools MM320KIT is a professional-grade electrical test kit featuring a digital multimeter with up to 600V AC/DC measurement, a non-contact voltage tester with built-in flashlight, a voltage tester, and a GFCI receptacle tester. Designed for versatility and safety, this kit covers a wide range of electrical diagnostics, from voltage and current to wiring fault detection, all housed in a convenient carrying case with batteries included. Trusted by professionals for over 160 years, Klein Tools delivers durability, precision, and comprehensive functionality in one value-packed set.












| ASIN | B08W1THSM8 |
| Best Sellers Rank | #24,153 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #41 in Multi Testers |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Color | Multi |
| Customer Reviews | 4.8 out of 5 stars 2,351 Reviews |
| Global Trade Identification Number | 00092644693403 |
| Included Components | MM320 Manual Ranging Digital Multimeter, ET45 AC/DC Voltage Tester |
| Item Dimensions | 12.4 x 7.91 x 2.24 inches |
| Item Length | 6.39 Inches |
| Item Type Name | Multimeters |
| Item Weight | 1.56 Pounds |
| Item Width | 3.12 Inches |
| Item dimensions L x W x H | 12.4 x 7.91 x 2.24 inches |
| Manufacturer | Klein Tools |
| Maximum Operating Voltage | 1000 Volts |
| Measurement Type | Multimeter |
| Minimum Operating Voltage | 12 Volts |
| Model | MM320KIT |
| Power Source | Battery Powered |
| Style | Multimeter and Receptacle Tester Kit |
| Style Name | Multimeter and Receptacle Tester Kit |
| UPC | 092644693403 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 60 Degrees Celsius |
| Warranty Description | Please refer to attached warranty document for information |
R**N
Good value for the cost
Quality product, good value for the money. Easy to read and use. Length of leads makes every job easy to to reach. Don't know about durability yet but I do believe this will fill almost every need I have of this package.
K**4
Good quality and variety
Very good set of testers
B**E
Multiple tools for Electric needs
You get 4 very useful tools to help with electrical work were ever you might find yourself. I bought this set because it was a great value for the dollar and my kids.keppt my other meters busy. I really like this meter.
J**.
A must for homeowners
best electrical tools on the market....every home owner should have these.
N**M
“Reliable Multimeter with Great Value, but Flimsy Case”
I’m relatively new to using a multimeter, so I’m still learning how to use it properly. However, I do understand their basic functions and how they operate. I specifically chose this brand because I’m already familiar with it—many of the building engineers I work with use and recommend it. I wanted to invest in something reliable with a strong reputation for accuracy and durability. Price-wise, this was a great deal. The multimeter alone was priced about the same at Home Depot, so for just $15 more, I was able to get additional accessories and a carrying case. That made the purchase well worth it. The only downside—and the reason I deducted a star—is the carrying case. It’s pretty flimsy and doesn’t do a great job of securely holding the components in place. While it does help keep everything together, the storage layout isn’t ideal, and items can easily fall out when you open it. Still, having a case is better than nothing. Aside from that, this multimeter is a solid addition to any toolset. It’s dependable, well-built, and functions exactly as expected. If you’re looking for a high-quality multimeter at a reasonable price, this one is definitely worth considering.
W**Y
When you buy quality you get quality
It works perfect
D**G
Great set of tools
Arrived on time Great price for what you get. Good quality
E**N
Great for light home improvement projects
Great product for light home improvement projects.
Trustpilot
3 weeks ago
3 days ago