Progressive, Extra Heavy Duty, Galvanized Steel, Safety Chain and Spring, Door Stop, for Heavy Exterior Doors, to Withstand Strong Winds (RDC-36 for 34" and 36" Doors)

Progressive, Super High Quality, Extra Heavy Duty, Galvanized Steel, Safety Chain and Spring, Door Stop. This door chain is unlike any other door chain available today. This is by far the strongest and heaviest. Designed for heavy exterior doors to withstand strong winds, like roof doors. The chain is covered with a heavy duty protective rubber (as seen in picture #2). To be installed on the push side of the door. Choose from 2 sizes. #RDC-36 for 34" and 36" doors. #RDC-30 for 30" and 32" doors. Designed to fit wood and steel doors up to 2-3/4" thick. The 3" X 3" galvanized plate has to be installed on the door, with included through bolts, bolted through the door. The 1-3/4" X 2-1/2" galvanized plate has to be installed on the door frame. Mounting and fastening hardware includes only through bolts for the door. We manufacture and include screws for wood door frames and self drilling screws for steel door frames. (see the self drilling screws in the pictures above). Easy to follow instructions. Please note, this door chain and spring does "NOT" slow the door down when opening or closing the door (a separate hydraulic door closer is required for that). The door will open and close as fast as the wind slams it. If the door has spring hinges, the door will open and close as fast as the spring hinges allows. The only thing this chain and spring does, it stops the door from opening any further then a certain degree, depending on the location it is installed on the door and on the door frame. (See the specifications and mounting guide in the pictures above).