Naniwa Superstone set 3pcs.

The sharpening stone set includes two sharpening stones from Naniwa's Japanese Super Stone series with grits of 400 and 5000, along with a holder. This sharpening stone set will restore sharpness to any dull knife. The stones in the set are intended for the following sharpening processes: Super Stone 400 for coarse sharpening and Super Stone 5000 for fine sharpening.

Before use, the sharpening stone should be soaked in water for about 5 to 10 minutes. There should always be a light film of water on the surface of the stone while sharpening. For knives that are sharpened on one side, place the sharpened side down on the stone first. Please ensure that you maintain the factory-set angle. Now, sharpen the knife with pressure towards the edge at an angle of 45° to the stone (to achieve a larger contact area), and release the pressure when moving the knife away from the edge. This process should be repeated in the same number of strokes as before.

After sharpening the knife on the sharpened side, lay it flat on the hollow ground side and repeat the sharpening process as described above, but only about 1/10 as many times as you sharpened the opposite side. For knives that are sharpened on both sides, perform the sharpening process as you would for one-sided knives, but maintain a sharpening angle of about 15°. It is important to sharpen both sides evenly to achieve a symmetrically sharpened blade.