King Japanese Nagura Stone #8000 Used as one of the popular accessories for finer sharpening stones This product is the only genuine nagura stone manufactured and sold by King. They develop a high-quality slurry and also serve to flatten high spots on the surface of sharpener After dripping water to the whetstone, rub the Nagura (which contains the abrasive). Then a good slurry develops and it speeds up the polishing. Size: 2.8" L x 0.8" W x 0.9" H