Extech MA3010 CAT IV TRMS 3000A AC Flex Clamp Meter Digital is designed with a unique 10" flexible jaw clamp that easily wraps around bus bars and cable bundles that are normally difficult to access with regular clamp meters. The Extech MA3010 features True RMS measurements, a thin 7.5mm diameter cable for tight areas, 3000 count backlit LCD display, and more.