D and D provides a wide range of products for wooden and metal door applications.
such as Stainless Steel Door Hinges, Door Locks, Lever Handles, Door Closers, Exit Devices, Door Stopers, Door Bolts and Door Accessories etc, not only door hardware but also Door Opening solution.
The D and D door set product category covers mortice locks, European profile cylinders, lever handles and hinges. Since the dimensions of all these products comply with DIN standards (DIN 18251 for mortice locks, DIN 18252 for profile cylinders and DIN 18255 for lever handles), the products are compatible amongst themselves regarding their functionality. All parts of the functional units are also perfectly aligned with each other.
A door closer is a mechanical device that closes a door after someone opens it. Door closers are required for fire-rated doors, which need to remain closed, to help prevent the spread of fire and smoke. Door closers have internal springs & hydraulic oil with cylinders and valves that adjust the speed of the door closing and latching. Practically every door in modern commercial, industrial, and institutional buildings is operated by a person passing through and closed by a mechanical door closer which keeps the door closed and under control at all times. Closers are available from the top brands including LCN, Norton, Yale, Falcon, Sargent, Corbin Russwin, Dorma, and Stanley.
