Pros
3. Ball Bearing Wheels These wheels use ball bearings to reduce friction, allowing for smoother operation. They are particularly beneficial for heavier doors and can be found in both plastic and metal variants.
Aluminium Windows Profiles
Cast Iron Railing Panel
Aluminum roll window profile
One of the most striking aspects of real spears is their diversity. Across different regions and eras, spears have been designed for specific purposes, illustrating how intimately human societies were connected to their environments. In Africa, for instance, the Assegai—a type of spear used by the Zulu people—was known for its long, slender design that allowed for precision in hunting and combat. Meanwhile, the Roman pilum was engineered to be a throwing spear, featuring a unique design that disrupted enemy shields, demonstrating the tactical thinking of ancient Roman armies.
This type of finished aluminum often oxidizes with a light white powder the more it is exposed to air and moisture.