The PosiTest DFT coating thickness gage is available in two models - Ferrous for steel or Combo for all metals. To eliminate guesswork, the PosiTest DFT Combo uses patented technology to automatically recognize the substrate and take a measurement. Fast, repeatable measurements and no calibration required for most applications make the unit ideal for powder coaters, paint applicators and automotive refinishers. Call 800/448.3835.