Describe: The grinding wheel is specially designed for ZWILLING knife lines to achieve its original sharpness. Grinding wheel has two sides: the face 250 for rough grinding, grinding to achieve quick abrasion; 1000 fine grinding surface to achieve the sharpness and original blade shape. Rubber trays fix the stick, making the knife sharpening easier and more efficient. Size Information: Weight: 0.8 kg Size: 18 x 8 x 4 cm Use: Dedicated for sharpening knives. Preservation: After grinding, clean the grinding wheel with water and wipe dry. Keep in dry places. Brand Information: Brand: ZWILLING. Material: stone. Products without warranty.