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Product Information

  • 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.

  • Frequency of Door Usage and Standard for Lock

    Guidelines for frequency of door usage and standard for lock

  • Door Hinges for Door System First

    Door hardware has a very important position in the modern complex function construction project. Door hinges for door system first.

  • How to Clean Brass Hinges

    Keeping brass hinges shiny and clean is very important. But over time, they might acquire a bit of grime or tarnish. Do you want to clean brass hinges by yourself? Now there are six ways which can help you clean them.

  • Composition Effects on The Magnetic Permeability of Austenitic Stainless Steels

    Austenitic stainless steels are generally non-magnetic with magnetic permeabilities of around 1.0. Permeabilities above 1.0 are associated with the amount of either ferrite or martensite phases present in the 'austenitic' steel and so depend on:
    chemical composition
    cold work and heat treatment conditions



  • Acceptable Quality Limit(AQL) Standard

    D&D Inspectors exclusively use ISO 2859 tables to measure AQL. These tables are a United States standard with equivalents in all national and international standardization organizations (ANSI/ASQC Z1.4, NF06-022, BS 6001, DIN 40080).


    Are classified under the same classifications as the door hardware in/on which they are integrated. This means that the access control systems supplied by GBM Solutions is classified according to EN1303 – cylinder for locks, DIN EN 18252 – locking cylinder for door locks, DIN EN 1906-door handles and door konbs and DIN EN 179 apply for the equipment that we supply .

  • What Is a Flag Hinge?

    A flag hinge is a piece of hardware used to allow movement of two pieces of material. They are commonly used on various types of doors to facilitate directional movement; the flag hinge itself is usually mounted on a vertical plane, thereby allowing horizontal movement of a door or other piece of material. The hinge consists of two parts: a male end with a plate and a pin, and a female end with a plate and a receiving slot. The two parts are joined together once each plate is secured to a different piece of material.

  • Different Product Rang of the Pinning Center

    The D&D pinning Center is staffed by factory trained technicians and is equipped with the latest computerized software and key cutting machinery.

  • Introduction Grade 3 Lever Handle

    D&D grade 3 level handle are suitable for high frequency of use by public or others with little incentive to exercise care and with a high chance of misuse , e.g.public office doors ,common area doors etc.

  • Door Locks Standard

    American National Standard Institute(ANSI).European(EN).Australian Standard(AS).CNACL China Local Fire Test Beauer Certificate CANCL to be satisfied

  • Mortise Lock Components

    D&D Hardware Mortise Locks are meet EN12209,according to DIN 18250, 18251, suitable for commercial, industrial and prestigious residential projects and provide different functions to meet various applications.

  • How to fix blocked door locks?

    In general, as long as there are doors, locks are needed, and locks are an integral part of any place. A door lock can protect the personal belongings are not violated, so to ensure the integrity of the lock is important. However, as the years accumulate, dust accumulation, wear or rust will occur on the locks, so do you know how to fix the locked door lock?

  • How does a mortise lock work?

    The mortise lock is a very popular and ancient design that has stood the test of time. They are sturdy and reliable. Their structures are also relatively diverse. Modern mortise locks are a popular lock often used in the security industry of commercial locksmiths. Its rugged design has stood the test of time. Mortise locks can be used for decades. In fact, these mortises exist in old houses and buildings and are resistant to bad weather and time.
    The mortise lock has a long life, so understanding the structure and principle of the mortise lock can provide great help for installation and maintenance.


Contact Info

:+86-139 2903 7292   David Jian

: +86-750- 3856396


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