DeFelsko PosiTest FM Coating Thickness Gage Measures non-magnetic coatings from 0-80 mils such as paint, enamel, plating and hot-dip galvanizing on steel Simple- Probe contact and dial rotation all in a one-finger operation with positive visual and audible indicators to designate when the thickness reading is established Durable- Extra rugged housing, not affected by mechanical shock, water, acid or solvents. Functions on a permanent rare-earth magnet, requiring no batteries of electronics. Fully submersible in water Accurate- Wear resistant Carbide Probe for long life and continuous accuracy. Conforms to international standards and includes Long Form Certificate of Calibration showing traceability to PTB Includes wrist strap and instructions in a high quality leather case with belt loops for your convenience