Extech MA3018 Digital CAT IV TRMS 3000A AC Flex Clamp Meter is designed with a 18" flexible clamp jaw to easily wrap around bus bars and cable bundles that would otherwise be difficult to access with regular clamp meters. The Extech MA3018 features True RMS measurements, a 7.5mm diameter cable for tight spots, 3000 count illuminated LCD display, and more.