A door that closes itself, slowly and without sound, is one of those small luxuries that most people never consciously notice- until they experience a space without it. The abrupt slam of an uncontrolled door, the draft that sneaks through an opening left ajar, the security risk of an entrance that never quite latches: these are the quiet failures that a quality door closer prevents. It is hardware that works entirely in the background, and that is precisely the point.door closer is a mechanical or hydraulic device that automatically closes a door in a controlled manner after it has been opened.