To put security strips on your door, start by cutting them at the right length.
If you like to work neatly, use a file to smoothen the edges. Do your nails while you're at it.
Put on the door strip first. Mark the edge of the door frame on the door.
Depending on the kind of strip you use you need to position it on the door, in my case the strip has to be 2mm away from where I marked.
Fix the strip with only 2 or 3 screws.
See if the door still closes (don't forget your keys!)
If it looks fine, get the other strip and mark where it needs to be.
Screw that strip on with 2-3 screws as well and check to see if the door still closes. If it does, put in 20 more screws and it's done!
