18). As the screw is tightened, the clip bends toward the insertion hole and into the wall. This bending creates a "grip" on the wall by either pressing onto the wall or by securing the drywall between the housing and the drywall clip. The most important thing to remember when mounting the wall box is that the outer trim must be installed flush against the mounting surface. FIG. 18 provides recommended cutout dimensions for the wall box. It is recommended that you cutout the surface slightly sma