This is a necessary tool to paint directly from a 2 gallon bucket. It will fit inside of a minimum 8" bucket opening. The sturdy rust resistant, plated grid is pre bent to secure the grid to the side of the bucket. The bottom of the grid ramp keeps the grid stable as the roller passes across the surface. The grid surface removes excess paint and distributes it evenly on the roller cover to assure a good result on the painting surface.