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 frame seal is a protective gasket or strip installed around the perimeter of a door frame to create an airtight, weatherproof, and often soundproof barrier when the door is closed. Made from materials like rubber, silicone, foam, or fire-resistant intumescent strips, it prevents drafts, moisture, dust, noise, and even smoke or flames (in fire-rated doors) from passing through gaps between the door and frame. Essential for both exterior and interior doors, it enhances energy efficiency by reducing heat loss, improves acoustic insulation, and ensures compliance with fire safety standards. Available in various types—such as compression seals, magnetic strips, or brush seals—it provides a durable, flexible seal that adapts to door movement while maintaining optimal performance.
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