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  • How to choose the American Standard Mortise Lock?

    When choosing the lock, the safety of the mortise lock is the first element. For the best protection, many buildings have mortise locks. The mortise locks do provide strong security and can be used in commercial and residential applications.

  • How to choose the right lock cylinder?

    European profile lock cylinders are the most popular type in the market. They usually have same shape but different in materials, sizes, brands especially the types of keys and locking mechanisms. The cylinder provides security functions such as anti-prying, anti-drilling, anti-shatter and anti-replication.

  • How does the lock cylinder work?

    The lock cylinder is the main part that controls the unlocking of the lock, and is an important part of the lock. The lock core and the key can rotate and drive the core of the lock bolt. The following explains the operation of the unlocking core with the European-style lock cylinder as the main explanation.

  • How to install the fire rated door hinge?

    Installation of fire rated hinge

  • How can a qualified team help customers provide professional solutions? -D&D hardware

    In order to provide customers with better and more professional services. Today, D & D hardware carried out professional training and assessment of product knowledge and technology.

  • How to maintenance the fire rated door hinges?

    Fire rated door refers to the door that can meet the requirements of fire resistance stability, integrity and heat insulation within a certain period of time. It is mainly used in the openings of firewalls, stairwell entrances, evacuation walkways, pipeline wellheads, etc. Fire rated doors are usually used for people. When a fire occurs, it can prevent the spread of fire and the diffusion of smoke within a certain period of time, ensure the safe evacuation of personnel, and play a role of sealing when the positive pressure air supply system is working. To ensure the quality of fire doors, the selection of hardware accessories is also an important link. Since fire doors are special for fire protection, of course, their accessories must also be special for fire protection, so the selection of fire door hardware accessories must be strict. Reasonable installation, proper management, and whether it is in place are directly related to the fire protection effect of the fire rated door.

  • Do the hinge need to fire rated?

    Fire rated hardware is the heart of a fire rated door. The hinge has an extremely important role in the door suspension system to ensure the normal opening and closing of the door. At the same time, hinges also play an important role in life, such as hinges used on fire doors. What happens if the fire door hinges does not use on fire door? Be the hinge necessary for fire protection?
    Below we analyze from two points, whether the hinge needs fire protection.

  • Door Closer CE EN 1154

    As a professional door closer manufacturer in China, we provide customers various exterior and interior door closer, like concealed door closer, heavy duty door closer, etc. Our door closers are high-quality, durable, anti-rust and textured. The door closers we provide are suitable for wooden door, metal door, fire rated door, double door, single door, steel door of commercial or residential application.

  • BS EN1303 Cylinders for locks

    As a professional door cylinder manufacturer in China, we provide customers various exterior and interior door lock cylinder. Our door cylinders are high-quality, durable, anti-rust and textured. The cylinders we provide are suitable for wooden door, metal door, fire rated door, double door, single door, steel door of commercial or residential application.

  • EURO Mortise Locks- CE Certificate-BS EN 12209

    The D&D Hardware rang of architectural lock is manufactured to the highest engineering standards and designed to offer a high price/performance ratio. They have been successfully type tested to all the requirement of BS EN 12209.

  • BS EN 1906 Lever Handles and Knob Furniture

    BS EN 1906 classifies door furniture by using an 8 digit coding system. A similar classification applies to all building hardware productStandards so that complementary items of hardware can be specified to, for instance, a common level of corrosion resistance, category of use, etc. Each digit refers to a particular feature of the product measured against the standard's performance requirements.

  • BS EN1154-Door Closer

    BS EN 1154:1997 -The European standard for the performance of controlled door closing devices.
    Providing details on product types, classification by use, test cycles, test cycles, door mass, corrosion resistance, as well as definations, product performance requirements, test apparatus, test methods and marking of products.
    BS EN 1154:1997 classifies door closers by using a 6 digit coding system.

  • Emergency Exit Doors Constructed According to The EN 1125

    It is desirable that doors at final exit in public buildings,places of intertainment, shops etc should be fitted with panic devices operated by a horizontal bar or touch bar. the emphasis for products coverd by this standard on safe exit rather than security.

  • Panic Exit Devices BS EN 1125

    It is desirable that the doors at final exits in public buildings, places of entertainment, shops etc should be fitted with panic devices operated by a horizontal bar or touch bar. The emphasis for products covered by this standard is on safe exit rather than security.

  • EURO Mortise Locks- CE Certificate

    As a professional door lock manufacturer in China, we provide customers various exterior and interior door lock, like Euro Mortise Lock, Privacy Lock, Deadbolt Lock, Bathroom Door Lock, Narrow Stile Lock, etc. Our door locks are high-quality, durable, anti-rust and textured. The door locks we provide are suitable for wooden door, metal door, fire rated door, double door, single door, steel door of commercial or residential application.

  • BS EN 12209 Building Hardware –Mechanically Operated Locks, Latch and Locking Plates

    D&D CE mark European Mortise Lock Successfully tested for conformity to all the requirements of BS EN 12209, 11 Classification:3X910G3BC20

  • BS EN 1935 Single axis hinges

    BS EN 1935 classifies door furniture door furniture by using an 8 digit coding system. A similar classification applies to all building hardware product standards so that complementry items of hardware can be specified to, for instance, a common level of corrosion resistace, category, category of use, etc. each digit refers to a particular feature of the product measured against the standard's performance requirements.

  • Butts and Hinges with ANSI/BHMA A156.1

    1.S1.1 This Standard establishes requirements for lightweight, standard weight, heavy weight and detention hinges. Cycle tests, lateral and vertical wear tests, friction tests, strength tests, finish tests.


    D&D Hardware: ANSI Grade 1 Door Hinge
    Tested to over 2,500,000 cycles = Durability
    UL Listed : 3 hours Fire Rated, Suitable for Fire/Smoke Resistant Doors
    For Metal Doors, Fire rated Doors, Wooden Doors etc.
    Suitable for Education, Healthcare, Hospitality and Commercial Applications.

  • ANSI and EN Hinge Comparison

    American National Standard Institute (ANSI) ANSI 156.1
    This Standard establishes requirements for butts and hinges. Cycle tests, lateral and vertical wear tests, friction tests, strength tests, finish tests, and material and dimensional requirements are included.


    Hinges manufactured accordance with ANSI / BHMA A 156.1.Dimension & tolerances confirm to ANSI-A 156.7.Full Mortise, Square Corner, Standard weight template hinge.

  • Cylinders and Input Devices for Locks with ANSI/BHMA A156.5

    As a professional lock cylinders manufacturer in China, we provide customers various exterior and interior Mortise lock. Our door locks are high-quality, durable, anti-rust and textured. The lock cylinders we provide are suitable for wooden door, metal door, fire rated door, double door, single door, steel door of commercial or residential application.

  • Auxiliary Hardware with ANSI/BHMA A156.16

    The bolt is a kind of anti-theft component to prevent the doors and windows from being opened from the outside.

  • Mortise Locks with ANSI/BHMA A156.13

    The lock body of American type inserted core lock is more stable than that of ordinary inserted core lock. It is more durable than ordinary door lock and simpler in structure. Its service life reaches 800000 times. It is durable, and its internal parts are still undamaged. The pinball of lock head has double differences in angle and length.

  • Exit Devices with ANSI/BHMA A156.3

    The panic exit device is also called fire escape lock. It is mainly used in the emergency exit doors of large supermarkets, shopping malls, office buildings, hospitals, schools, factory buildings and other public places with large flow. It has the function of preventing outsiders from entering the interior without permission and achieving the safe escape of insiders in case of fire and other emergencies.

  • Bored and Preassembled Locks and Latches with ANSI/BHMA A156.2

    The American National Standard Institute (ANSI) is a non-profit non-governmental standardization organization in the United States. It is the coordination center of voluntary standards system. It was founded in 1918 and headquartered in New York. There are more than 250 professional societies, associations, consumer organizations and more than 1000 companies (including foreign companies) participating. Representatives of federal government agencies participate in their activities on their own behalf, and do not receive government funding.

  • Door Controls-Closers with ANSI/BHMA A156.4

    The significance of the door closer is not only to close the door automatically, but also to protect the door frame and the door body (stable closing). More importantly, the door closer has become an important executive part of the intelligent management of modern buildings. Door closers are mainly used in commercial and public buildings, but they are also used at home. They have many uses, the most important of which is to make the door close by itself to limit the spread of fire and ventilation in the building.

  • D&D Team participated in the DHI Seminar on Architectural Hardware

    In order to assist customers find the Right Door Opening Solutions, D&D Team often participate in Architectural Hardware Association Training, strengthen the door hardware Professional knowledge, skills and competitiveness.

  • What should i consider when buying an Exterior Door Handle?

    When buying door handle, you need to pay attention to essential elements. The essential elements will help you to choose the right exterior door handle to fit your needs. As the most important feature of a door it can be the showpiece of the front of a home. It is a functional and beautiful for any door; however, the perfect front door handle can be difficult to locate. All in all, the right exterior door handle needs to be durable and elegant and needs to fit all of your home's needs.

  • How Qualified D&D Team can assist customers find the Right Solution?-D&D Hardware

    In order to provide professional assistance to our customers to find the most suitable solution, we have product knowledge training every month. The trainer is a door hardware engineer with more than 12 years of work experience in the industry.

  • Why Choose Stainless Steel 304 Door Locks?--D&D Hardware

    In front of the lock forms on the market, many consumers are confused; don't know how to choose the stainless steel door lock to be both safe and durable?

  • The key to buying an indoor door lock - Pay attention to the lock cylinder, lock body!

    In modern home decoration, there are often some inconspicuous parts that play an important role. And we often overlook the importance of them, know that there is a problem, and everyone began to pay attention, then it was already late. Among them, there are indoor door locks that are often overlooked. In general, indoor door locks are in contact with us every day, so we must pay attention to its purchase work. However, for home improvement white, because of the little knowledge of interior door locks, it is difficult to quickly purchase a truly beautiful and high quality product. The interior door lock is one of the hardware. Its role is relatively large. It can be said that the privacy of our home is guarded by it. At the same time, it directly affects the use effect and service life of the interior door. Since it is such a key component, how can we choose it?

  • Application Technique of Door Hardware

    Door hardware has a very important position in the modern complex function construction project.
    Standardized and professional hardware plays an important role in ensuring the operation, safe escape, security, environmental comfort and aesthetic of a building.
    8 considerations of configuration (Core application technology in the industry) as below

  • How to choose the right hinges for your door & project?

    When it comes to doors, hinges is very important. Their style and functionality have a huge effect on the performance of your doors. The good news is that a wide range of hinge options are available, so there's an excellent chance there's a hinge out there that's right for your application.

  • How to choose door hardware for wooden door?

    The Door Accessories that complements your door—the Door Hinges, Locks, Lever Handles, Door Closers, Flush Bolts, Door stopper, faithfully perform their jobs. Should you choose the door hardware, it is important to account for budget, style and function. As a professional suppliers of door hardware, D&D offers a combination of architecture door hardwares to suite the individual building whatever it is exterior or interior, meeting not only the requirements for design and function, but also the desired budget.

  • Do you know the type of door hinges?

    In daily life, door hinges can be seen everywhere. There are many types of hinges. Do you know how to name it? Please follow us to see the main types.

  • How to choose Hinge for Door?

    The door hinge is an important part of door, it can make open and close the door easily, can also make the door installation and removal easy. We have plated the surface of exterior and interior door hinges, it looks smooth and deepens the beauty of commercial building. Compared with single hinge, the door hinges hardware offers additional savings.

  • How to choose Door Closer?

    The door closer is a hydraulic device similar to the spring on the door head. When the door is opened, it can be released after compression, and the door can be closed automatically. It has the function of spring door, which can ensure that the door can be closed to the initial position accurately and timely after being opened.

  • How to select correct Door Closer for Interior door?

    Choosing a door closer changes depending on many different factors including customer preference, manufacturer options, and building specifications. Other factors to consider include:Size and weight of the door.Location of the door.Opening and closing frequency.Mounting location.Affordability.Backswing requirements.

  • Do you know how to choose your door handle?

    Choosing your door handles there are 4 things to consider. At the same time ,this might seem a little daunting, it isn’t if you follow the steps below. The important things you will need to consider are......

  • How to install door cylinder?

    Installing the cylinder of a euro lock may be necessary if a set of keys has been lost or you move into a new property and want to be confident that there are no keys unaccounted for. Or you may want to change the style of lock to one with an internal 'thumb turn' knob - this is ideal where you do not want to be locked out of a room (such as a child's or old person's room. Alternatively you may want to change from a 'thumb turn' lock to a double key style - probably advisable for a front door where there are children in the household.

  • Architectural Hardware Installation Guide

    The general term for metal and non-metal products and accessories installed in buildings or structures. Generally, the utility model has double effects of utility and decoration. Door hardware refers to all kinds of metal and non-metal accessories installed on the building door. There are building lock, handle, support, hinge, door closer, handle, bolt, anti-theft chain, door closing device, etc.

  • How to adjust a door hinge

    The door can be said to be very important furniture, every place needs to use the door, so, the door hinge is very important, if the door hinge damage or wear, the door will not be easy to open, next let me introduce you how to adjust a door hinge.

  • Interior wooden door hinge installation method

    Hinges, is an important part of the furniture, is related to function and service life of furniture. The specifications with function increasingly rich, the hinge is multifarious, but plus ca change or after installation to ensure that the products use safety and comfort. Let us know the butt door hinge installation method and points for attention.

  • How to install door hinges on an interior door?

    Door hinges play an important role in door, making the door open or close easily. When you buy the hinges, maybe you have trouble in installing the door hinge. Now, there has easy way to let you know how to install door hinges.

  • How to Install a Closet Door Ball Catch?

    To allow your handle-less closet door to remain shut, you will want to install a closet door ball catch. Closet door ball catches come in many sizes and finishes. Choose the one that matches the style of your home.

  • How to install a Peephole in door?

    Adding a viewer or peephole to your door is a simple project. There are many styles and brands of door viewers to choose from, including models with up to a 200-degree viewing range, allowing you to see almost everything on the other side of the door.
    This guide provides step-by-step instructions that show you how to install a peephole in your front door in an hour or less.

  • How to install door coordinator?

    The door coordinator is a locking mechanism arranged on a locking shaft and a small shaft. One end of the locking plate of the locking mechanism is in contact with the inner end of the release shaft. The outer end of the release shaft is a touch end which can be extended outside the shell and touched by a door leaf. One end of the rocker arm is arranged on the locking shaft, the other end is provided with a touch device which can be touched by another door leaf, and the locking shaft and the small shaft are respectively provided with a locking recovery torsion spring. The utility model has a simple and compact structure, solves the problem of the sequence of closing the double fire doors, and makes the fire doors play a reliable role of fire prevention and partition. When the double fire doors are closed, they shall be closed in order to ensure their fire and smoke prevention functions. The fire door can be closed as required to meet the fire protection requirements.

  • How to install door chain?

    Installing a door chain on your front door is a very easy and quick way to boost your home security. It will give you the peace of mind knowing if you’re home alone and someone calls to the door, you can safely open the door enough to check who it is.

  • How to install panic bar?

    A panic bar is a type of door hardware used to allow occupants to exit a building quickly during an emergency. This device features a horizontal bar or push pad that releases the door's locking mechanisms with a single action. Rather than twisting levers to struggling with thumb turns or knobs, occupants can throw their weight into the device and release the door immediately. This type of device is useful in a panic type emergency, as it minimizes the risk of crowding or injury at the exits. It may also reduce the number of lives lost to fire or other emergencies.


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