Extech CA3010 CAT IV 3000A AC Flex Clamp-on Adaptor Portable expands almost any multimeter’s capabilities to measure AC current up to 3000A with a 10" flexible clamp jaw that wraps around bus bars and cable bundles with ease. The Extech CA3010 features a 7.5mm cable diameter for tight locations, 3 unique AC current measurements ranges, simple twist to open and lock jaw clamp, real-time battery level indication, and more.