High Accuracy: The tester instrument is highly accurate with micron-level color scale due to its compatibility with digital thickness gauge. Quickly and accurately check if the vehicle has been painful Magnetic tip: This is a magnetic paint thickness gauge. Its magnetic tip is extremely handy for reaching curved surfaces and in hard to reach places. No batteries required: its mechanical feeler gauge is water resistant, no batteries required and can be used in the rain and on a dirty car. Easy to carry: it is shaped like a small pen, and is made of high quality materials, which makes it the perfect choice to carry and always be prepared. Color Measurement Scale: The colored gauge shows you exactly what you have to deal with when it comes to metal thickness and paint on it, and it will easily reveal all the damage.