Four cable priouts with cable clamps for non-metallic sheathed cable. Two 1/2" conduit knockouts (sides). One 1/2" conduit knockouts (bottom). J side-mount bracket with spurs and holes for toe-nailing. Gauging notches at 3/8" and 1/2" for wood studs. . Octa gon boxes are used in the installation of ceiling or wall light fixtures. UPC bar code.