[Automatic reading of steel and aluminum] The coating thickness gauge is designed with dual technology. The nondestructive coating thickness gauge eliminates the speculation of testing the surface coating by automatically identifying ferrous and non-ferrous metal substrates.[Practical multi-function instrument for various applications] It is very suitable for inspecting the thickness of automobile paint, such as used car paint, powder paint, anodized aluminum oxide, bathroom accessories, bicycle frame, stadium seats, outdoor sheds, furniture, swing, cabinets and lockers, computers, electrical appliances and toys. [Perform car performance on used cars to save money] Sometimes, the body repair shop will hide all the information that can't tell us that the car has a serious collision visually. When purchasing a used car, check the car paint to ensure that the paint thickness on each panel is approximately the same. [Easy to read display] The paint depth gauge with large screen display shows the metal type, working mode, quantity, battery status and reading in µ m or mils