2 pull the inner and outer sides.
How to replace a security screen door lock.
Open the screen door to access both sides of the lock body.
Did you lose the key somewhere near your house and now you are worrying that perso.
Loosen and remove the machine bolts from the inner half of the body with a screwdriver or a screw gun.
Cylinder will then pull out.
Insert the new bolt into the opening on the edge of the door and fasten it to the door with the provided screws.