The AEMC 400D series Digital FlexProbes are True RMS AC current measurement tools, designed for easy access and measurement in confined spaces. They are available with various sensor lengths (6", 10", 24", etc.) and can measure from 20mA to 4000A, depending on the model. These probes are rated for 600V CAT IV and feature auto-ranging, HOLD function, and direct reading on a 4000-count display.