Slide In door closer is an essential mechanical device designed to automatically close a door after it has been opened. It ensures the door closes smoothly and securely, maintaining safety, privacy, and energy efficiency by controlling the speed and force of the closing action. Slide In door closers can be adjusted to control the closing speed and force to accommodate different sizes and weights of doors, as well as to comply with accessibility requirements. They are widely used in commercial, industrial, and residential buildings to prevent doors from slamming, reduce energy loss, and enhance fire safety by ensuring doors are closed in the event of a fire, helping to contain the spread of fire and smoke.