Additional locks for windows and doors

Do you want to buy a lock? Then you have come to the right place at Doorbeslag-expert. Our range includes a wide range of locks for almost every application. Think of door locks, window locks, furniture locks, gate locks and more. Below you will find an overview of the different locks.

Order directly and use our fast and free delivery service. In most cases you will receive your ordered locks tomorrow.

Do you need help choosing the right lock? Please feel free to contact us and we will be happy to help you.

DX – Mortice additional lock DX SKG**® keyed alike, per 2 pieces

Original price was: €78.29.Current price is: €46.00.
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Dulimex Overlay lock narrow externally rotating no. 011 SKG*® white

Original price was: €35.78.Current price is: €16.10.
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DX – Mortice security deadbolt lock for Euro profile cylinder – DX – SKG**® – Stainless steel front plate (striking bowl) and lock plate with rounded corners – lock case

Original price was: €34.37.Current price is: €17.80.
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Dulimex Overlay lock narrow externally rotating no. 011 SKG*® black

Original price was: €35.78.Current price is: €17.50.
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DX – Mortice security deadbolt lock for Euro profile cylinder – DX – SKG**® – Stainless steel front plate (striking cup) and lock plate with square corners – lock case

Original price was: €34.37.Current price is: €17.50.
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Dulimex Overlay lock narrow inward turning no. 011 SKG*® white

Original price was: €40.49.Current price is: €18.00.
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DX – Mortice additional lock DX SKG**® with different keying

Original price was: €34.37.Current price is: €18.65.
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DX – Espagnolette lock – SKG**® – excl. cylinder – 530 – 2500mm zamac Black

Original price was: €386.10.Current price is: €249.85.
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Axa Overlay lock Cyl external rotation SKG1 white 30122098bl

Original price was: €47.44.Current price is: €27.25.
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Axa Overlay lock Cyl inward turning SKG1 white 30152098bl

Original price was: €58.04.Current price is: €35.25.
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DX – Espagnolette lock – SKG**® – excl. cylinder – 530 – 2500mm

Original price was: €386.10.Current price is: €240.30.
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Axa Overlay lock Cyl external rotation SKG1 alu 30122090bl

Original price was: €53.97.Current price is: €31.00.
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Are you looking for an additional lock ? You will find these within this category. The locks are from well-known brands and have the SKG quality mark. An additional lock is used for extra security, in addition to the use of an existing lock. This makes the doors extra burglar-resistant. Additional locks are available in different designs. You can buy an additional lock quickly and cheaply at Deurbeslag-Expert.nl. All our locks are SKG approved with three stars, the highest class in burglar resistance for locks.

Need help choosing the right side lock? Please feel free to contact us.


Additional locks are locks that are placed as an extra lock in a door. Often there is already a lock present, or there is already an option to lock a door. The locks are available with different backset sizes.


Why choose a side lock?

Having an extra lock is not mandatory, but it is highly recommended. This is because an additional lock significantly improves the security of a home. It is recommended by the Police Quality Mark for Safe Living (PKVW). A door with one lock is easier to force than a door with multiple locks. Especially when the second lock is placed in a different location.


Secure doors with additional locks

Making your home burglar-resistant does not have to cost a lot of money. You can buy some locks and accessories that can secure both your doors and windows well. You may feel safe enough with a security lock , but the fact is that today we need more to keep burglars out of our homes.

You could perhaps install an additional lock in your front door. It serves as extra security and it will take even longer for them to find a way into the house. There are different types of additional locks:

  • Pen locks
  • Additional mortise locks
  • Additional rim locks
  • Door or window latches
  • Window trees
  • Mortise latches

The pin lock is the most commonly installed and is ideal for wooden doors. They must be maintained, otherwise they can fail. They also have quite large keys, but they are easy to install.

Mortise locks are a bit more difficult to install, but that also gives you the feeling that they are more difficult to break through. They must be purchased together with a profile cylinder, security fittings and locking bowl and may therefore cost a little more money, but they are worth the money.

Chances are you are already familiar with rim locks. They are operated with a button and are used more as a main lock on storage and box doors. This is used less and less as an additional lock.

And then we come to the windows. Door or window latches can only be locked from the inside. You have a choice between keys and push buttons when it comes to opening and closing them. They are available in different models.

A window tree comes with a locking bowl or locking hook and these can also be operated with keys or push buttons. They can also only be locked from the inside.

Mortise latches have been around for a while. It is actually better to choose a different side lock because it can fail quite quickly. In addition, there is a possibility that you will suffer door damage when you want to replace it, because this lock can only be opened from the inside.


The best side lock

So there are more than enough side locks to choose from. It is better to choose a side lock that can be operated from both the inside and outside. It will just be more convenient for you. If we look at it objectively, we see that the mortise lock is actually the best. It is sturdy, does not break easily and the cylinder is easy to replace. In addition, you do not have to walk around with large keys. You will receive a small key that can easily be added to your key ring.

For optimal security, choose a lock with SKG 3 stars. This is the side lock you need. They are the best when it comes to burglar-resistant locks. Are you looking for such additional locks? Then you can take a look at Door fittings expert . We have mortise locks in different sizes and you can have them delivered to your home. You can expect them at home within 2 to 3 days. We also have other products that you can take a look at. We also have hinges and locks , security fittings , handles , door knobs and many other items that you can use to secure your home and make it even more beautiful. Do you need a large number of products? Then you can request a quote from us.