With non-metallic sheathed cable clamps. Two 1/2 in conduit knockouts and four cable knockouts, (sides). One 1/2 in 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. 50 pound maximum recomended static load. J side-mount bracket with spurs and holes for toe-nailing. UPC bar code.