The CA3018-NIST is a 3000A AC flex clamp-on adaptor for multimeters and clamp on meters with standard sized banana plugs. The CA3018-NIST is an 18 inch flexible clamp capable of measuring AC Currents up to 3000A. Complete with built-in flex clamp cable, 6.6ft (2m) lead with banana plugs and two AAA batteries. UL listed with a CAT IV 600V safety rating. Includes certificate traceable to NIST.