Doublesided functionality: This sharpening stone has dual surfaces for coarse and fine grinding to meet sharpening needs across various kitchen tools. Efficient rough grinding: The 400 grit side enables fast repairs, effectively addressing dullness and blade damage to restore knives quickly. Fine grinding: The 1000 grit side provides refined sharpness by removing imperfections and burrs, helping extend the life of kitchen knives with regular use. grade emery material: Made from emery material for durability and consistent sharpening performance over time. Practical applications: Restore a dull chef knife or utility knife before cooking, using the 400 grit side first and finishing with the 1000 grit side. Maintain edge quality for daily use by performing regular fine sharpening to keep blades precise for slicing and chopping. Quick touchups between tasks to refresh edges on common kitchen tools such as paring knives and small utility blades.