Ratchet: A feature of a special wrench which allows you to turn the handle in one direction to tighten a nut or bolt, but on turning in the opposite direction, does nothing but position the handle back where you started to continue tightening. Related posts: Personnel Management Operative Functions Administrative Role of PM Competency HR Management Role Change Personnel Policies Personnel Procedures Appealed Policies Implied Policies Specific Policies Personnel records Research Pure research Personnel research Attitude or Opinion Survey Turnover Secondary research Applied research Personnel audit Read more articles Previous PostRadius rod or Thrust member Next PostRatchet screw driver