How to make the security screen flat and stable?

We MAISHI mainly produce stainless steel security screen.

To make the security screen flat and stable there is a very important step:
Stretching the mesh to make the wire straight and holes square and beautiful.
Here is the picture showing our factory stretching the mesh on the machine.
After stretching the mesh is more stable and flat.

If anything we can help or any inquiry about security screen feel free to contact with us.