Traditional outlets have the plates held on by just one screw. That screw runs through a piece of plastic that is just 0.4 inches (10 mm) wide. The screw pulls

Traditional outlets have the plates held on by just one screw. That screw runs through a piece of plastic that is just 0.4 inches (10 mm) wide. The screw pulls the whole plate against the wall, which probably sticks out a bit due to an uneven surface. That stress point, right at the screw, will break.