This dial micrometer is the one I trust the most in our material house. It has flat spindle faces that are 6.35 mm in diameter. Its range is 0 - 10 mm graduated in 0.01 mm. One dial revolution is equal to 1 mm. A knurled wheel on top of the tool operates the spindle. It is supplied in a plastic box. Being hand-held, it can be brought to the work.