If you buy something using links in our stories, we may earn a commission. Learn more. A good multimeter is like the Swiss Army knife of electronics tinkerers. It's so useful you'll rarely put it away ...

Extech Instruments has introduced the MA620 (AC) and MA640 (AC/DC) 600 A true RMS clamp meters. The affordable new clamp meters are compact and easy to hold while offering an ample 1.5" (40 mm) jaw ...