National Hardware Spring Hinge is i for use in corridors, entrances, and stairways, providing a reliable solution that automatically closes doors without the need for overhead mounted door closers. This hinge features a patented ratchet adjustment that eliminates the need for an adjustment locking pin, making installation and maintenance easier and more efficient. Designed to enhance door functionality with minimal effort, it is a practical choice for both residential and commercial settings. Model Number: N236-012