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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. 

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Thumbturn Cylinder

A Thumbturn Cylinder is a unique type of lock cylinder that has been designed in such a way that it can be opened either from the inside or from the outside, which makes it different from other types of locks. The thumb turn lock cylinder, turns on its side, so that the thumb and fingers of one hand can fit snugly against the side of the door cylinder while the other hand is free. In case of emergencies where you may find yourself trapped in a closed garage or any other such situation, this locking cylinder will enable you to open the door easily. This unique feature of the thumb turn lock cylinder makes it highly secure, which is why it is used in high security European commercial sectors, military installations, banks, hospitals, shopping centres and even in residential areas. The thumb turn lock cylinder is also used in high-end automobiles, which is another aspect why it is considered as a highly secure lock cylinder.

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 +86 139 2903 7292


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