The PosiTest DFT Ferrous Coating Thickness Gage measures non-magnetic coatings on steel. It is the economical choice that retains the uncompromising quality of DeFelsko coating thickness and inspection instruments. *Fast, repeatable measurements *Ready to measure - No calibration required for most applications *Displays the moving average for up to the last 10 measurements *Strong, wear resistent, ruby-tipped probe *Flip Display for right-side-up viewing in any position *Audible and visible measurement indication *V-groove in probe for positioning on cylindrical parts *Mils/Microns switchable *Two year warranty on body AND probe.