1 in OD|Low profile, unobtrusive appearance, blends with any decor or setting|Fittings have removable covers which allow easy access to wiring for changes and additions|Used to hang fixtures|Base has four holes for fixture studs, four 1/2 in CRFB size knockouts and raised section for no-bolt fixture stud|Use as a junction or pull box with 5736 blank cover|ScuffCoat finish, tough, durable scratch-resistant finish which can be overpainted with latex paint|Surface mounting eliminates disturbing the building structure or wall finish to make renovations easy|Full line of fittings provides unlimited wiring solutions and interconnection between raceway systems