detail of skilled worker`s hand with digital micrometer gauge

accuracy adjustable background bearing black blue button caliper calipers chuck closeup detail digit digital display distance electrical electronic engineering exactness finger gauge gray hand hold human industrial industry instrument jaws lathe linear machinetool machining manufacturing measure measuring mechanic mechanical metal meter metre micro micrometer micrometre millimeter motion nail number operator precise precision processing quality scale sepia silver skilled steel technical technology tolerance tool trade turning white work worker workers yellow