For removing the burr after sharpening, and to polish the blade. It will leave a very smooth, fine edge which works best with meat/fish knives like gyuto, yanagiba, deba, sujihiki. Naniwa Super* whetstone enables fast and efficient sharpening of Japanese knives. This is a splash-and-go stone, so it is not necessary to soak it before sharpening, just splash some water on the top side of the stone and start. For easier sharpening, we recommend purchasing a Stone Holder (Sink Bridge) to ensure mess-free and a stable position of the stone during sharpening. Specifications: Grit: #8000 Dimensions: 210 x 70 x 20mm Stone series: Super Stone Model: S2-480 *Sidenote: Due to market expansion, Naniwa often changes the product name and its packaging - the Naniwa Super stone is the same stone as the Naniwa Advanced stone, with the same composition and characteristics.