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⚙️ Master your measurements with precision and confidence!
The Klein Tools MM420 is a professional-grade auto-ranging TRMS digital multimeter designed for electricians and serious DIYers. It measures up to 600V AC/DC voltage, 10A AC/DC current, and 50 MΩ resistance, plus temperature, capacitance, frequency, and more. Featuring Lead-Alert safety LEDs and a complete kit with carrying case and thermocouple, it delivers reliable, accurate readings with industry-grade safety ratings (CAT III/IV). Trusted by thousands, it’s the essential tool for precise electrical diagnostics.












| ASIN | B0B57PFFYX |
| Best Sellers Rank | #56,014 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #260 in Multi Testers |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Color | Orange/Black |
| Colour | Orange/Black |
| Country Of Origin | China |
| Customer Reviews | 4.7 out of 5 stars 596 Reviews |
| Global Trade Identification Number | 00092644693748 |
| Included Components | Digital Multimeter, TRMS Auto-Ranging, 600V, Temp |
| Item Dimensions | 23.7 x 12.9 x 9.7 centimeters |
| Item Length | 6.41 Inches |
| Item Type Name | Building Material |
| Item Weight | 50 g |
| Item Width | 1.78 Inches |
| Item dimensions L x W x H | 23.7 x 12.9 x 9.7 centimeters |
| Item weight | 50 g |
| Manufacturer | KLEIN TOOLS |
| Measurement Type | Multimeter |
| Minimum Operating Voltage | 9 Volts |
| Model | MM420 |
| Part Number | MM420 |
| Power Source | Corded Electric |
| Power source | Corded Electric |
| Specification Met | Cat Iii 600v Safety Rating |
| Style | w/Lead Alert |
| Style Name | w/Lead Alert |
| UPC | 092644693748 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 1000 Degrees Celsius |
T**U
Automobile
This is very good product
Trustpilot
2 days ago
5 days ago