With non-metallic sheathed cable clamps. Two 1/2" conduit knockouts and four cable knockouts, (sides). One 1/2" conduit knockout, (bottom). Octagon boxes can be used in the installation of ceiling or wall lighting fixtures or as a junction box. Not designed for ceiling fan support. 1-1/2" deep, 11.8 cubic inch capacity. UL Listed, acceptable for use in 2-hour fire rated walls.