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⚙️ Master your measurements with Klein’s powerhouse multimeter—because precision is the new professional.
The Klein Tools MM420 is a robust, auto-ranging TRMS digital multimeter designed for professionals who demand accuracy and durability. It measures up to 600V AC/DC voltage, 10A AC/DC current, and 50 MΩ resistance, plus temperature and capacitance. Featuring lead-alert safety LEDs, a backlit display, and a rugged build that withstands 2-meter drops, it’s engineered for reliable performance across residential, HVAC, and light industrial environments.












| ASIN | B0B57PFFYX |
| Best Sellers Rank | 95,894 in DIY & Tools ( See Top 100 in DIY & Tools ) 204 in Multi Testers |
| Brand | KLEIN TOOLS |
| Colour | Orange/Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (866) |
| Global Trade Identification Number | 00092644693748 |
| Included Components | Digital Multimeter, TRMS Auto-Ranging, 600V, Temp |
| Item Dimensions | 23.7 x 12.9 x 9.7 centimetres |
| Item Type Name | Digital Multimeter, TRMS Auto-Ranging, 600V, Temp |
| Item Weight | 50 g |
| Manufacturer | Klein Tools |
| Manufacturer Part Number | MM420 |
| Measurement Type | Multimeter |
| Minimum Operating Voltage | 9 Volts |
| Model Number | MM420 |
| Power Source | Battery Powered |
| Specification Met | Cat Iii 600v Safety Rating |
| Style Name | w/Lead Alert |
| UPC | 092644693748 |
| Unit Count | 1.0 count |
| Upper Temperature Rating | 1000 Degrees Celsius |
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