FeaturesIntegral brackets securely hold box to concrete block from front and back in masonry block walls, even in irregular openingsQuick and accurate positioningBreak-off front tabs(4) end, (4) side and (2) bottom knockoutsMade from durable galvanized steelRACO® masonry boxes are designed to accommodate the mounting of switches or other devices in masonry wallsRugged welded design does not fall apart during constructionForward mounted grounding provision allows for easy installation of grounding pigtailWelded construction