*With proper fitting *Used for Conduit, NMSC, Armored, Metal Clad, Flex cable *Acceptable for use in 2 hour fire rated wall Hanysen Square Box, 1-1/2 or 1-7/8" deep, welded, with each side having two 1/2" and one patented TKO knockout for 1/2" or 3/4" knockouts use. Bottom has two 1/2" & 2 TKO knockouts for 1/2" or 3/4" use. Bump bottom grounding.*Used for Conduit, NMSC, Armored, Metal Clad, Flex ...