2-1/8 in deep 4 in square brawn boxes with (8) 1 in side knockouts and (2) 1/2 in & (2) 3/4 in bottom knockouts are installed in walls or ceilings for lighting fixtures switches receptacles or other outlet devices. Square boxes are used to bring power to a number of electrical devices where multiple conductor runs are split in two or more directions. Garvin' 4S Boxes can be surface- or flush mounted when multi directional conduit runs are necessary.