SWC 54181-OW 4" Oct Ctin Old WrkBx

3-1/2 in deep 4 in old work cut in octagon boxes with plaster ears & old work clips and (2) 1/2 in side knockouts and (3) 1/2 in & (2) 3/4 in bottom knockouts are used for adding fixtures outlets security cameras and other deep devices in existing wall surfaces. Garvin' octagon boxes are made with a versatile combination head screw that can securely fasten a conduit to an electrical junction box using a slotted Phillips or Robertson head screw driver.