Naniwa QA-0160 Whetstone for Refacing (Grooved)

When opened package it was chipped on the corner. Since I don't use just the corner I decided to not return. Does it's job.

It's a very fast cutting stone, very flat as expected from flattering stone, but little parts of it come off while you flattering your stone, and those little pieces easily scratch your entire stone, damaging it pretty bad... I recommend every few passes wash this stone and the stone you are flattering to avoid any small parts rolling on the stone, listen and fill when there is little piece rolling between the stones. Other than that it gets the job done but you have to be really careful because it can also ruin your stone...

This is a very nice flattening stone

I used this to bring a 50 year old Japanese stone back to flat. It had about .25” of a bow in the middle... took about 3 hours, but the results made me smile. Highly recommend.

I almost hate this flattening stone, but it does get 2 stars because the seller sent it right on time. However, for it's use, it made gouges in my stones, no matter how much I tried to clean up its edges. It also was VERY slow in shaving the stones down to size. 5 minutes of rubbing, and it didn't do much. I would NOT recommend this flattener, unless you plan on using it on the most coarse of whetstones, like no more than 800... and you have a lot of time.

excelente

Works good but arrived with big piece broke off

good quality