This line of products includes a US & China approved patent of Auto Locking mechanism, to prevent the disengagement of the screen from the wall, unlike other screw locking mechanisms that are usually not performed. In the Auto lock mechanism there aren't any cords or springs that might break and it includes 2 hanging points on each side, instead of the single hanging point in most locking mechanisms. This mechanism is now included in most of our fixed and tilt TV mounts.