2-1/8" deep, 4-11/16" junction boxes with (6) 1/2” & (6) 1/2”-3/4” side knockouts and open back with mounting tabs and 8-32 screws are larger boxes that are installed when larger sized conductors are required. These dual access boxes allow covers or plaster rings to be mounted on either side of the box after device installation. They are great for industrial applications. Garvin Industries’ 2-1/8” deep boxes provide extra volume for wiring and devices.