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Your cart is empty.- The straightening whetstone quickly corrects trough on the whetstone - You can use emery for a more beautiful and faster finish - Particulate density 220
Iwil
Reviewed in the United States on January 5, 2025
It allowed me to flatten my sharpening stones quickly and accurately.
Jordan
Reviewed in the United States on January 20, 2025
Great value. No complaints
B. Selby
Reviewed in the United States on October 20, 2024
I'm happy with my stone. I checked it with a leveler right out of the box. It's flat and works great.
Customer
Reviewed in the United Kingdom on November 24, 2023
I was a bit alarmed with people saying there's was not flat and true.I trust the brand so ordered anyway, mine is spot on true and flat.Used it on 230 through to 12000 grit stones and it preformed perfectly.Quick word of warning don't use it to bevel the edges of the stone, I now have a neat one millimeter groove down the length of mine. It hasn't spoilt it's preformance, in fact I think it probably helps clear the slurry.After doing eight stones, some of which were quite dished it's still perfectly flat and apart from the afore mentioned groove shows no signs of wear.If you do get a stone that's off flat just take it outside with a bucket of water and rub it on a concrete paving slab, we have some in our garden.. Soon sorts it out, can do your sharpening stones the same way but you risk embedding concrete particles.I've been sharpening for years, over fifty and feel confident to highly recommend this stone.
Rolidnot
Reviewed in the United States on February 20, 2022
I have used a full sheet of 120 or 220 grit waterproof silicone carbide sandpaper on a piece of 12”x12” 1/2 inch plexiglass to flatten my water stones for 40+ years. Over all those years I’ve probably spent 50 times the cost of this Naniwa stone on silicone carbide sand paper.The sandpaper method works OK but it’s annoying for a bunch of reasons so I finally broke down and bought this Naniwa flattening stone.The Naniwa is faster than my old method, easier to use and store and the Naniwa leaves a nice finish on all my stones. The Atoma 140 diamond plate is the best tool for flattening but it’s expensive.My only “con” is that I wish it was about 25 % larger. Naniwa makes a bigger flattening stone but it’s about $70. If I need a stone that big, I’ll revert to my full sheet of silicone carbide sand paper and plexiglas.Attached is a photo of the Naniwa stone (black) next to my tan 50 year old King 6000 grit water stone. Hope that helps!
amandascott
Reviewed in the United States on November 14, 2022
My cousin was gifted some used Norton oil stones that need some serious attention.The were dished pretty bad in the center.I used this Naniwa and water to flatten them.Took about a half hour to do each side on 3 stones.Had to rinse them off every few minutes because of the amount of material removed.They came out perfectly flat.Dry everything off with a rag and let them air dry.Very happy with this stone.3 hours later and some very sore arms my stones are good as new.
ツヨポン
Reviewed in Japan on March 25, 2021
面直しをする砥石よりも小さく面直しがしにくい。
Eva Rico
Reviewed in Spain on December 3, 2021
Excelente relación calidad precio, muy duradera.
G.M
Reviewed in France on October 28, 2020
J'avais une pierre à eau bien tordue à force des aiguisages réguliers de mes couteaux de cuisine. En une vingtaine de minutes je l'ai redressée et elle est comme neuve. Un super produit pour compléter sa panoplie d'entretien.
Paul N
Reviewed in Canada on November 3, 2019
Nice product, does exactly what it's designed for.
Customer
Reviewed in the United States on June 10, 2018
Unlike some other reviews for this product, mine arrived in perfect condition, not broken at all. I used it to flatten a 1000/6000 stone, and it worked beautifully. I didn't develop any sunken portions of the stone as has been reported in other reviews. This leads me to believe it was technique on the part of others (not trying to be critical of them here however). One thing to know is that I'm pretty new to stone sharpening, so if you've been sharpening knives for longer than a year or two, take this review with a grain of salt.Another concern was the longevity of the stone, but after repairing my pretty badly worn out whetstone, It had barely put a dent in this flatting stone. I think it should remain good for me for a couple of years at the least.It does seem like the quality the stone arrives in can vary between purchases, so that might be up to fate. Mine arrived just fine.Overall, I couldn't be happier with my purchase.
Matt W.
Reviewed in the United States on July 29, 2017
I wanted to practice flattening my waterstone. So I started using the non-uniform side first. Big mistake. My stone was severely cupped after only 30 seconds or so. So I switched to the other side of this product (completely flat side) and was able to flatten the stone properly. This might work a little better if the stone being flattened has a shorter length than the corrector. My stones are a bit longer than this corrector and it seems like either this or my inexperience is causing a very slight concavity in the final stone. All that being said, this product works very well to get a nice even surface for sharpening!
Philip J. Taylor
Reviewed in the United States on March 10, 2016
This stone did not come flat. I guess you have to buy two of them and face them on each other.EDIT: I am ordering a second of these stones. I am sure that for the price of a second stone this will be a FIVE STAR product.The finish it leaves on a 6k grit waterstone is very nice. Also, if you happen to like a crowned stone, the slight warp in this stone will give you a nice shallow crown.
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