Door Hardware Surface Mounted Safety Spring Door CloserSurface Mounted Safety Spring Door Closer Convert your hinged door into a self closing one with the Safety Spring Door Closer. The Safety Door Closer is powerful. This closer is designed for use on both left or right handed in swinging doors. Made with a die cast body, and having twin torsion springs. Simply mount the closer body to the jamb of the door, and use the longer closer bar and shorter adjuster bar to wind the barrel to the desired strength.