The back ones installed easily and fit perfectly using the existing factory screws.
The front ones had to be modified quite a bit with a sharp knife.
The screw hole openings in the front ones had to be elongated to where the screws could actually fit back into their holes on the car.
The bottoms of the front ones had to be cut away on the inner corners to make room for the existing fender well lining and metal of the car body.
In the photo, the left is cut/modified and the right is uncut.
Also, the tabs sticking out had to be cut off, too, as they were unneeded.
The fronts do not fit 100% around the bottom, but it is so little that I doubt anyone will notice unless they are down low specifically inspecting them.
The rears fit perfectly.
An extra screw was needed on the fronts to make them fit correctly, or the inside would have been sticking out at an angle.
I know this is off topic, but I also added blind spot mirrors on each side.