Small size and big functionality: This closed door hinge integrates automatic door, damping, holding function and hinge. Replace the original hinges with this invisible door closer to remove doors, floor and wall stops, dampers, internal door closer and door clips. Restore the original beauty of doors, floors and walls and reduce their load. Home Companion: Soft closing door closers have lower opening pressure than traditional door closers, there is therefore no difficulty in opening the door. It will be a friendly companion for the elderly and children and will be more suitable for family use. Hydraulic door closer is hidden in the hinge, so it will not cause harm to the elderly, children. It will not damage doors, walls and floors. Widely Used: This exterior door closer is made of high quality 304 stainless steel and filled with hydraulic oil. The exterior door closer can work well in extreme environments. Door springs are non-manual door closers. So it can be used for both left and right doors. Ideal for swing doors, interior doors, exterior doors, garden doors, front doors, screen doors, glass doors, bedroom doors, balcony doors.