The Checkline DCF-2000 Coating Thickness Gauge Ferrous, 0.01 - 78.0 mils is a precision instrument that accurately measurse the thickness of paint, plating, galvanize and other coatings on all metal surfaces. These 2000 Series Coating Thickness Gages incorporate the latest technology to provide consistent, highly accurate results in a wide variety of applications. The 2000 Series Coating Thickness Gauges include Single Purpose models for use on ferrous or non-ferrous surfaces and a Dual Purpose models for use on all metal surfaces.