Because we carry a line of high quality Dorma door closers (manufactured in the U.S. and in Germany), we are able to meet a variety of door closing needs, from high use doors to high wind areas, economical options, and special applications. All of our Dorma closers come with a 25-year warranty. Take a look at some of the doors in your daily travels and you will notice that many have oily or dark spots below the closer. These closers are failing and will not last. If the door was installed by Double D Locks, a brand new replacement closer would be installed with no charges for hardware, to keep the doors closing safely and efficiently. Let us take a look and determine the best options for you!