Is there only one type of micrometer or are there many? There are a number of different types of micrometers that you can buy to increase the versatility of your measurement workshop. While the more basic types of micrometer (inside, outside, and depth) will cover a number of measurements that you might be making, having a wider range of micrometers available will increase your measurement accuracy. Different micrometer types are built to specifically measure particular areas of a part, such as a screw thread, the dimensions of a groove, the various depths of holes, circles, tolerance limits, tubes and pipes, and much more. In measurement, precision and accuracy are key. The more specialized set micrometers you have, the higher levels of precision and accuracy you will achieve with your measurements.