Drywall Master 12" High Capacity Finishing Flat BoxHigh Capacity Finishing Boxes keep you running longer. Fewer stops to fill your box means less time wasted on trips back and forth to your filling station. Use finishing boxes to apply mud over taped joints on walls and ceilings. Drywall Master boxes are made of superior quality, long wearing alloys built to conquer. Drywall Master Flat Finishing Boxes apply mud over taped joints on walls and ceilings. These boxes are made of superior quality, long