The Australian Standards require a security door/screen to withstand impacts of 100 joules simulating a would be intruder kicking in a door 5 times. It has to do this without the mesh coming away from the frame or the mesh itself being penetrated.
Invisi-Gard can withstand this and more, in fact it resisted 50 impacts of 100 joules!
This video shows the test that simulates debris hitting a screen in a storm packing winds of 180km per hour. This is a 4kg block of hardwood fired at 20 meters per second!
For the best in security and corrosion resistance you can not beat Invisi-Gard.