Two 1/2 in and two 3/4 in conduit knockouts (sides). Two 1/2 in and two 3/4 in conduit knockouts (bottom). No bracket. 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. UL 514-A listed, File E195978, acceptable for use in 2-hour fire rated walls. UPC bar code.