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.
What a door coordinator does is "coordinates" the sequence of the doors closing. The Inactive door needs to close first, then active leaf. Normally used on Double Door openings that are fire rated - due to each leaf required to be self latching and self closing. Doors with closers on each leaf and/or astragals are prime locations for coordinators.