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Crash Chain Installation For Doors. Essentially the crash chain acts as a door stop, It prevents a door from swinging to far past 90 degrees. When a Door does swing past 90 degrees it tends to break the door closer that manages the speed of the door. This crash chain prolongs the life of a door closer. Some businesses have customers who are very aggressive and try to force a door open past the 90 degree angle of the door and frame. This breaks door closers. So all this said this crash chain saves the business owner hundreds if not thousands of dollars annually. I hope you enjoyed the YouTube Video.

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