# 400 Grit Diamond Sharpening Stone Ideal for flattening sharpening stones, providing a smooth and satisfying sharpening experience. Continuing to use a sharpening stone without flattening it will cause it to wear unevenly, preventing a proper edge from being formed. Therefore, it's necessary to flatten the surface regularly. ■ How to Use ■ Draw diagonal lines on the entire surface of the sharpening stone with a pencil, and then use the diamond sharpening stone to wet-grind until the pencil lines disappear, resulting in a uniform surface. For the finish, apply light pressure and gently stroke the stone to achieve a more beautiful surface. Size: Approximately 152 x 63 mm ※ Please be aware of similar products that have unauthorized reproduction of our images and text. Our products are all inspected and adjusted before being described. ¥200 discount for combined shipping with other items. (Please request in the comment section or use the bulk purchase function before purchasing.)