Zibra Square Paint BrushWindows - The square brush was made with windows in mind! The narrow 1" brush head was shaped to fit in most window mullions perfectly, great when precision control is needed.Narrow Molding - The small 1" brush head on our square brush is the easy choice when painting narrow molding on baseboards, walls, or furniture.Flat Ledges - The square brush also is a great choice when painting flat ledges, like on the arm of a chair.PB100LZS