The quadrilaterals are usually produced in sizes 5, 6, 8, 9, 10, 12, 14, and 16, and each one has its own special applications. The number of wrought iron structures is increasing.
Four sides in size 8 and 9 are suitable for making all kinds of furnace fences due to their higher resistance and strength than size 5-6.

4-sided size 10 is usually used for forging operations and is widely used in the construction of doors and windows.
4-sided 12 is widely used in protective structures due to its high endurance. Heads of protective spears, building doors and fences are parts of the building that are used in their construction.
Size 14 and 16 of this profile is suitable for bearing very heavy loads due to its high strength. It is used for high endurance and is also used in customized structures.
In addition to the four sides that are used in the building, there are also trans sides that have different uses. If the size of this type is from 2 x 2 to 10 x 10 mm, they are used in various small industries to produce all kinds of locks, but larger sizes are usually used in the production of accessories with high precision and elegance.