The Klein Tools MM320KIT is a comprehensive electrical test kit designed for professional electricians, contractors, and serious DIYers who need reliable, multi-function diagnostics on the job site. This all-in-one kit combines a digital multimeter, a non-contact voltage tester, an outlet/receptacle tester, and an AC/DC voltage tester — giving you everything required to safely troubleshoot panels, receptacles, circuits, and wiring in a single package. Whether you're commissioning a new residential build, servicing a commercial panel, or diagnosing a fault in the field, the MM320KIT delivers the accuracy and versatility to get the job done safely and efficiently.
Digital Multimeter (MM320)
| Voltage Measurement |
Up to 600V AC/DC |
| Current Measurement |
Up to 10A DC |
| Resistance Measurement |
Up to 2 MΩ |
| Additional Tests |
Battery, Diode, Continuity |
Non-Contact Voltage Tester (NCVT-3P)
| Low-Voltage Range |
12–1000V AC |
| Standard Voltage Range |
70–1000V AC |
| Flashlight |
Built-In, Independent Operation |
AC/DC Voltage Tester (ET45)
| AC Voltage Range |
28V–240V AC (4 residential levels) |
| DC Voltage Range |
32V–330V DC (4 common levels) |
| Test Lead Holder |
Built-In (2 positions: TR outlet spacing & storage) |
Receptacle Tester (RT210)
| Wiring Faults Detected |
Open Ground, Reverse Polarity, Open Hot, Open Neutral, Hot/Ground Reversed |
| GFCI Compatible |
Yes – Tests & Confirms GFCI Operation |
| Outlet Compatibility |
Standard & GFCI Receptacles |
Kit Details
| Model |
MM320KIT |
| Brand |
Klein Tools |
| Product Type |
Electrical Test Kit |
