Our #4000 grit Super Deluxe Finish Stones are made by the Matsunaga Stone Company. They are used to remove the scratches left by coarser stones and to prepare the edge for final honing on a #6000 grit finishing stone or #8000 grit polishing stone. They will give a finer finish than a #3000 grit stone and will rapidly produce a razor like edge. In many situations, this rapid edge will be entirely suitable for job at hand. As with the #3000 grit stones, they are recommended to give your cutlery a polished edge. Large Size: 8- 1/4˝ x 2- 7/8˝ x 7/8˝, comes on plastic base.