Universal Installation,Fits most out-swinging doors; includes all necessary mounting hardware. No tools needed,thumbscrew dial makes it easy to fine-tune the door's closing speed for safety and comfort. Door closers reduce noise disturbances when closing doors, close doors slowly to minimise damage caused by slamming and prevent you from forgetting to close the door. Material:stainless steel With a closer slide plate being surface mounted, installation is a breeze. Easily adjust the tension on this safety spring door closer.Get it mounted perfectly in minutes on any interior wood or metal door, Manufacturer: KUARWDVF