King Kitchen Toishi ruční brusný kámen #250 / #800 s držadlem

Product detailed description

King TOISHI Combination Water Sharpening Stone JIS #250/800

The King Kitchen Toishi Hand Sharpening Stone combines two of the most common grit sizes for everyday kitchen use – a coarser #250 side for basic reshaping and a finer #800 side for sharpening and fine-tuning the blade. It's the ideal tool for anyone looking for a quick, practical and safe sharpening solution without needing to place the stone on a table or use a holder. Thanks to the plastic handle with integrated finger protection, sharpening is very comfortable and also suitable for beginners. The stone material is made of aluminium oxide (corundum) with a synthetic binder, which ensures even sharpening and a long service life. Sharpening is effective and gentle on kitchen blades.

Before use, the stone must be soaked for approximately 3 minutes until the surface is evenly moist. It does not need to be soaked for a long time – after a short swelling, it is ready for immediate use.

You can find sharpening and whetstone maintenance accessories in the section Sharpening Accessories.

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Knife sharpening course

We regularly hold knife sharpening courses for beginners, where we teach you how to sharpen stones using the traditional Japanese method.

How to properly sharpen with the King #250 / #800 hand stone

1. Soak the stone:

Before sharpening, immerse the grinding part in water for approx. 1–2 minutes until air bubbles stop being released. The surface should remain damp during sharpening – add water as needed.

2. Choose the correct grit:

The #250 side is used to repair a blunt or serrated edge, or to quickly reshape the edge.

The #800 side is suitable for general honing and smoothing – it follows the coarse side or can be used alone for regular maintenance.

3. Grip and guidance:

Thanks to the ergonomic handle, hold the sharpening stone in your hand like a scraper. Position the knife at an angle of approximately 15–20° to the sharpening surface and draw the blade across the stone as if you were trying to slice off a thin layer.

4. Alternating sides:

Sharpen alternately on both sides of the blade until the damage disappears or a uniform edge is formed. Then switch to the finer side (#800) and repeat the movements to polish and align the edge.

✅ Final tips:

You can sharpen with a vertical stroke or a circular motion, as you prefer.

For regular maintenance, it is sufficient to use only the #800 side.

Regular sharpening is recommended approximately 1× per week with daily cooking.

✅ Sharpening stone maintenance

After sharpening, rinse the stone with clean water to remove any metal residue and allow it to air dry completely (not on a radiator).

If depressions or unevenness develop on the stone over time, level them using a flattening (flattening) stone, to maintain a smooth and even surface for future sharpening.