The Naniwa Chosera 400 whetstone uses magnesia as binder for the abrasive, in this case white aluminium oxide.

The Chosera stones do not soak up any water so the stones do not need to be sprinkled with water frequently. This makes Chosera stones rather easy to sharpen with. Because of their hardness you will not cut into the stone easily and sharpening with these stones will take less time. Their hardness make them a good choice for knives made from hard steel.

Splash with water before and during sharpening, do not soak or store in water.

Grit: 400

Measurements: 210 X 70 X 25 mm

Fixed on plastic baseplate with non-skid rubber feet

About grit sizes
Whetstones come in various grit sizes. The higher the number, the finer the grit. A finer grit results in a sharper knife. Sharpening a really dull knife on a fine grit will take much time, so you will need to treat it on a coarser grit first.

• 120 - 600: Appropriate when real dull knives need to be brought back in the right shape
• 800 - 1,000: Appropriate to sharpen knives that were already in a reasonable state
• 2,000 - 3,000: For a result sharper than most knives are when they leave the factory
• 5,000 - 12,000: To polish the knife and get a razor sharp edge

Remarks pertaining to Chosera sharpening stones
During manufacture, Chosera sharpening stones are bound with magnesium. This superior production method guarantees superb results. However, these magnesium-bound stones are more prone to developing hairline cracks. To prevent this from occurring, it is important NOT to use too much water when wetting Chosera sharpening stones. So Chosera stones should NEVER be left to soak in water for a prolonged period of time! It is also important to dry these stones thoroughly after use and store them in a dry, dark place.

Amount of reviews by our customers: 73

Score over-all:	9.1 / 10
Price-Quality ratio:	8.8 / 10
Meets expectation:	9.3 / 10
Average score:	9.1 / 10

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Review from:	justin, Limbach	Score over-all: 10 / 10 Price-Quality ratio: 9 / 10 Meets expectation: 10 / 10
Product shipped on:	28 October 2011

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Review from:	rfmorris, Monster	Score over-all: 7 / 10 Price-Quality ratio: 8 / 10 Meets expectation: 7 / 10
Product shipped on:	03 October 2011

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Review from:	René, Wildegg	Score over-all: 6 / 10 Price-Quality ratio: 5 / 10 Meets expectation: 8 / 10
Product shipped on:	20 August 2010

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Review from:	Ralli, Kamen	Score over-all: 10 / 10 Price-Quality ratio: 10 / 10 Meets expectation: 10 / 10
Product shipped on:	10 May 2010

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Review from:	Anoniem, Gelnhausen	Score over-all: 9 / 10 Price-Quality ratio: 9 / 10 Meets expectation: 9 / 10
Product shipped on:	15 April 2010

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Review from:	Helmut, Obertraubling	Score over-all: 10 / 10 Price-Quality ratio: 10 / 10 Meets expectation: 10 / 10
Product shipped on:	01 April 2010

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Review from:	tonb, Berkel-Enschot	Score over-all: 9 / 10 Price-Quality ratio: 9 / 10 Meets expectation: 10 / 10
Product shipped on:	21 December 2009

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Review from:	sporter, Heerhugowaard	Score over-all: 10 / 10 Price-Quality ratio: 10 / 10 Meets expectation: 10 / 10
Product shipped on:	14 March 2011
Review from www.knivesandtools.nl. For your convenience translated into English. Beautiful stone, great for first sharpening your knives, as long as they aren’t too dull.

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Review from:	PB, Antwerpen	Score over-all: 10 / 10 Price-Quality ratio: 10 / 10 Meets expectation: 10 / 10
Product shipped on:	06 December 2010
Review from www.knivesandtools.nl. For your convenience translated into English. Brilliant product. Managed to get all my dull knives razor-sharp again without any problem!

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Review from:	Gerard, Westzaan	Score over-all: 9 / 10 Price-Quality ratio: 8 / 10 Meets expectation: 8 / 10
Product shipped on:	12 November 2010
Review from www.knivesandtools.nl. For your convenience translated into English. Haven’t had much experience in sharpening knives but this is a great stone at a reasonable price.

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Review from:	jacques, Huizen	Score over-all: 8 / 10 Price-Quality ratio: 7 / 10 Meets expectation: 9 / 10
Product shipped on:	27 September 2010
Review from www.knivesandtools.nl. For your convenience translated into English. Excellent stone for sharpening knives that have had a lot to endure!It’s a pity that the grain size is only stated on the top of the stone because it disappears pretty quickly!And what’s more, the 1000 stone and the 400 stone are both the same colour.Not really clever of the manufacturers, but still a super stone!It comes with an excellent little stone for flattening the surface of the stone.

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Review from:	J. van der Schoof, utrecht	Score over-all: 8 / 10 Price-Quality ratio: 8 / 10 Meets expectation: 8 / 10
Product shipped on:	14 June 2010
Review from www.knivesandtools.nl. For your convenience translated into English. Superb stone, perfect size! Great to be able to shape the edge of your knife properly. Just use a finer grain to polish the blade afterwards and your knife is just like new again, or even better.

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Review from:	Rien, Purmerland	Score over-all: 9 / 10 Price-Quality ratio: 7 / 10 Meets expectation: 8 / 10
Product shipped on:	30 March 2010
Review from www.knivesandtools.nl. For your convenience translated into English. I now own 4 Naniwa Chosera stones. I bought the Chosera 600, 1000 and the 2000 stones several weeks ago. But I was still missing a coarser stone for the first stage. I ordered the 400 stone and it works wonderfully. Now I don’t have to work so hard with the other stones! I don’t regret buying these stones and I’m even thinking of buying the Chosera 5000 stone soon.

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Review from:	Kanunnik123, Leeuwarden	Score over-all: 8 / 10 Price-Quality ratio: 7 / 10 Meets expectation: 9 / 10
Product shipped on:	22 March 2010
Review from www.knivesandtools.nl. For your convenience translated into English. The Naniwa Chosera 400, 800 and 2000 grit water stones are relatively cheap to buy. They are ideal for sharpening knives without too much effort. That’s why they meet the three most important requirements for me: fast, good and cheap!

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Review from:	Pieter, Antwerpen	Score over-all: 9 / 10 Price-Quality ratio: 9 / 10 Meets expectation: 9 / 10
Product shipped on:	22 March 2010
Review from www.knivesandtools.nl. For your convenience translated into English. Works perfectly! I can finally slice a tomato properly again ;-)

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Review from:	deol, Rheinstetten	Score over-all: 10 / 10 Price-Quality ratio: 9 / 10 Meets expectation: 10 / 10
Product shipped on:	02 November 2011
Review from www.edenwebshops.de. For your convenience translated into English by Google Translate. The only drawback: If too much water under the stone reaches the holder slips sometimes. Otherwise, everything fine.

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Review from:	Harpdaddy, Flöha	Score over-all: 10 / 10 Price-Quality ratio: 10 / 10 Meets expectation: 10 / 10
Product shipped on:	18 October 2011
Review from www.edenwebshops.de. For your convenience translated into English by Google Translate. Since I already machined with a 220 on my Tormek stone the blade geometry I needed a good sanding with coarse grit stone for manual. From the Naniwa Chosera series I already have a 400 and a 2000s stone. This stone perfectly complements my grinding and sharpening equipment. It absorbs well and is easy for me to do so (I am demanding in terms of quality). I would encourage them to purchase.

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Review from:	Pascal, Rotselaar	Score over-all: 10 / 10 Price-Quality ratio: 9 / 10 Meets expectation: 10 / 10
Product shipped on:	10 October 2011
Review from www.knivesandtools.nl. For your convenience translated into English by Google Translate. I like a full set bought 400 - 1000 - 3000 and 5000. The latter two are excellent for "minor maintenance" of the blades sharp and they quickly received. The stones costs somewhat, but it is better immediately estate investing if you want your precious knives properly maintained. I used the Eden grinding tests purchased (for practicing with cheap knives), but these Chosera stones are a totally different world, by their larger size, they work just better, you better read the cutting edge maintained and the quality of the stone is that it is much faster and less risk the knife to scratch.

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Review from:	CB, Bergschenhoek	Score over-all: 9 / 10 Price-Quality ratio: 9 / 10 Meets expectation: 9 / 10
Product shipped on:	15 August 2011
Review from www.knivesandtools.nl. For your convenience translated into English by Google Translate. This stone is of excellent quality water. Better than the whetstones I already had. In use, these whetstones very pleasant. I expect many more years to make use of.

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Review from:	Alexander de Grote, Zwolle	Score over-all: 9 / 10 Price-Quality ratio: 9 / 10 Meets expectation: 9 / 10
Product shipped on:	15 August 2011
Review from www.knivesandtools.nl. For your convenience translated into English by Google Translate. As usual, good, fast and excellent service! Stone on the water, I am very pleased, to practice, but the results are. Thank you.

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Review from:	Oliver, St. Christina	Score over-all: 10 / 10 Price-Quality ratio: 10 / 10 Meets expectation: 10 / 10
Product shipped on:	27 June 2011
Review from www.edenwebshops.de. For your convenience translated into English by Google Translate. A coarse water stone in its category of best. Many thanks

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Review from:	Herman, Voorburg	Score over-all: 10 / 10 Price-Quality ratio: 10 / 10 Meets expectation: 10 / 10
Product shipped on:	27 May 2011
Review from www.knivesandtools.nl. For your convenience translated into English by Google Translate. Beautiful wheel very useful not only for the blades but also for my chisels. I already have a number of knives sharpened, and it works fine also the larger surface of the stone. I have purchased a set of four stone and am very pleased with the quality.

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Review from:	Paco, Barendrecht	Score over-all: 8 / 10 Price-Quality ratio: 9 / 10 Meets expectation: 9 / 10
Product shipped on:	27 May 2011
Review from www.knivesandtools.nl. For your convenience translated into English by Google Translate. all products are delivered, to meet a great way to my preferences, minus point is that the TNT employee did you arrive all the details of the consignment to persons that have nothing to do with Haden. Thanks for all those beautiful products

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Review from:	BHamou, Warmenhuizen	Score over-all: 8 / 10 Price-Quality ratio: 7 / 10 Meets expectation: 9 / 10
Product shipped on:	14 March 2011
Review from www.knivesandtools.nl. For your convenience translated into English by Google Translate. Sharpening is piece of cake after you just watch some movies on the Internet. The knives are sharp and yesterday a Naniwa Chosera Water Stone 1000 grit to polish my knife further and get even sharper. It is unfortunate that the stones are expensive.

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Review from:	Mike Molto, Wolfsburg	Score over-all: 8 / 10 Price-Quality ratio: 10 / 10 Meets expectation: 10 / 10
Product shipped on:	01 March 2011
Review from www.edenwebshops.de. For your convenience translated into English by Google Translate. The grinding stone itself provides excellent results, top field and top sanding. There is no hardship because of the accidental catching of the blade in stone, with appropriate scoring at the stone surface. The prize money must be described as very good. The weak point is the grindstone holder. A not very successful solution of plastic. Contrary to the product description it is not slippery .. When evaluating a particularly negative is that the stone is glued into the bracket and it has no chance of the stone, without destroying it is likely to put in another holder. Maybe it can make a direct importer eden webshops its influence on the manufacturer's claim so as to change that. Otherwise, I can only recommend the stone itself.

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Review from:	L. Bekkering, NOORDWIJK	Score over-all: 9 / 10 Price-Quality ratio: 9 / 10 Meets expectation: 9 / 10
Product shipped on:	19 May 2010
Review from www.knivesandtools.nl. For your convenience translated into English by Google Translate. Have this stone for some time now in my possession and am very satisfied. Did good the first video first and then studied old (read cheap) blades sharpened. There were some hakkeltjes and there was even a piece of this stone but then started over in 1000 and finally at the Belgian chunk. Now you can cut it again ridiculously good. Use the stones now for my more expensive knives that I can now. Go here for the time being by practicing with it before I go Bunmei grinding.

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Review from:	Luc, Geel	Score over-all: 10 / 10 Price-Quality ratio: 10 / 10 Meets expectation: 10 / 10
Product shipped on:	25 January 2011
Review from www.knivesandtools.nl. For your convenience translated into English by Google Translate. Very pleased with both the stone, as the fast delivery, ordered Monday and Wednesday afternoon at home already!.

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Review from:	Martijn, Baarn	Score over-all: 10 / 10 Price-Quality ratio: 8 / 10 Meets expectation: 9 / 10
Product shipped on:	24 January 2011
Review from www.knivesandtools.nl. For your convenience translated into English by Google Translate. Absolutely top water stone, great results (though with the 800 and 2000 used)

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Review from:	Scasi, Bergheim	Score over-all: 10 / 10 Price-Quality ratio: 10 / 10 Meets expectation: 10 / 10
Product shipped on:	17 January 2011
Review from www.edenwebshops.de. For your convenience translated into English by Google Translate. With the stone can be ground very well, without lifting the stone over, the stone is worth the money, I can only recommend.

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Review from:	Arno w, oldehove	Score over-all: 9 / 10 Price-Quality ratio: 9 / 10 Meets expectation: 9 / 10
Product shipped on:	29 December 2010
Review from www.knivesandtools.nl. For your convenience translated into English by Google Translate. This is a good stone, but I think it still too coarse, this stone is for a knife that looked very blunt with thick heels, or inserted, they can be quickly grinding away, and then go finer.

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