1-1/2 in deep, 4 in octagon boxes with (2) 1/2 in side knockouts and (3) 1/2 in and (2) 3/4 in bottom knockouts have old working clips and plaster ears for retrofit cut in applications in walls or ceilings. They are used to install ceiling and wall lighting fixtures, fans, or convenience outlets and devices. Garvin Industries octagon boxes are made with a versatile combination head screw.