The essence is to prevent nut or bolt head from spinning. You can use multiple fasteners in a single track and position freely.
Advantages of Wrought Iron Fencing
If you’re looking for a heavy-duty fence and have a need for security, wrought-iron fence is the best fence out there. Wrought iron holds up well if you expect excessive wear and tear over the years. Because it’s such a heavy material, wrought iron is the best fit for high security environments, like prisons and government buildings. You’ll also see a lot of wrought iron in historic districts as this was the most popular material used aside from wood for many years. Wrought iron also works best when installed on flat terrain and requires custom fabrication, meaning you will need professional equipment on your property to complete installation.
In contemporary settings, decorative wrought iron has found its place in both indoor and outdoor spaces. Iron gates and fences are popular for adding security while enhancing the aesthetics of a property. They can be tailored to match the architectural style of a home, creating an inviting entrance.
Maintenance and Care
sliding door runner wheels

Relatively simple and effective method for connecting aluminum profiles for windows and doors. It allows two profiles to attain a strong and quick fix.