The Fowler 52-225-176-0 Digit Counter Depth Micrometer has a measurement range of 0-6" and 0.0002" accuracy. This depth micrometer is suitable for precise measurements in various manufacturing, machining, and mechanical engineering applications. Depth gages are precision measuring instruments used to determine the depth of a shape that has a step, groove, or slot. These gages often take the form of sliders that travel on a measuring beam or rods, are moved to the position by hand, and then adjusted with a calibrated screw. The gage base rests at the top of the shape whose recession is to be measured, while the beam or rods extend to the bottom of the recession to determine the measurement. Gage position is read from a graduated scale, dial, counters, or an electronic display. Fowler, an American company, manufactures premium inspection and measurement instruments like electronic indicators, calipers, bore gages, and micrometers. The company, founded in 1946, is headquartered in Canton, MA.