Professional sharpening stone by IZUMI ICHIAGO in TOP quality. The combination stone is specially designed for resharpening fine kitchen knives. By combining the grit 1000 (fine grinding) and 3000 (polishing), an exceptional sharpness of your knives is achieved. Application: Soak the sharpening stone in water for 10 minutes before use. The rubber base provides a secure hold on the table/surface. The 1000 grit gives the knife a fine grind. To achieve a perfect grind, professionals then polish the edge with the 3000 grit for the so-called high-end polish. "Länge: 180 mm Breite: 60 mm Höhe: 30 mm Gewicht: 560/630 g