A mask frame assembly includes a frame, a first support bar, split masks, and a second support bar. The frame includes an opening. The first support bar spans the opening in a first direction, the first support bar includes first ends disposed on the frame. The split masks span the opening in a second direction crossing the first direction, the split masks include first portions disposed on the first support bar and second ends disposed on the frame. The second support bar is disposed on the first support bar, the second support bar being more magnetic than the first support bar.