When a window brake or door brake needs to be replaced, two of the most common models in Swedish homes are Assa Fix 150 and Assa Fix 160. Many people wonder what the difference really is between these models and which one fits their window or patio door.
In this guide, we'll go over the differences between Fix 150 and Fix 160, when they're used, and how to know which model you need.
What are Assa Fix 150 and Fix 160?
Fix 150 and Fix 160 are window brakes from Assa Abloy that are used in side-hung windows and patio doors. The brake allows the window or door to stay in the open position instead of slamming shut or opening completely.
Both models work on the same principle – a brake that creates friction in a rod when the handle is pressed down.
You can see the models here:
The main difference between Fix 150 and Fix 160
The most important difference is how powerful the brake is and what types of windows or doors it is used for.
- Fix 150 often used in windows and lighter window doors
- Fix 160 often used in patio doors and larger windows
Fix 160 is generally a stronger model that can handle heavier doors and larger openings.
When is Assa Fix 150 used?
Fix 150 is usually installed in:
- Side-hung windows
- Smaller French doors
- Lighter patio doors
It is often used in homes where the door or window is not too heavy.
When is Assa Fix 160 used?
Fix 160 is common in:
- Patio doors
- Balcony doors
- Larger windows
The stronger brake allows the door to stay stable even if it is larger or heavier.
How do you know which brake you have?
The easiest way is to check the brake that is already installed in the door or window.
You can identify the model by:
- look for markings on the brake housing
- measure the length of the brake
- compare with product images
If your patio door no longer stays in the open position, it may be a sign that the brake is worn out and needs to be replaced.
Read more here:
Balcony door won't stop – solution and guide
Can you replace Fix 150 with Fix 160?
In some cases, models can be interchangeable, but this depends on the door design and installation, so it is usually best to choose the same model that is already installed.
If you are unsure, you can compare with our range of brakes:
Summary
- Fix 150 is most often used in windows and lighter doors
- Fix 160 is often used in patio doors and larger windows
- Both models work on the same principle
- It is usually best to replace with the same model
If you need a new brake, you can find the right model here:







