- Sharp Pebble Large Flattening Stone- Dual Grit Coarse/Fine Sharpening Stones Flattener- Diamond Grooves Whetstone Fixer-Re Level Any Whetstones & Waterstones

It is great stone flattener. I use this to keep my sharpening stone to keep flat, as it eventually start curving. I feel like my sharpening stone can not be useless without this. Unless use this flattener and keep the stone flat, we can't sharpen the knives in correct angle. It might even damage knives. This is a must have, if you sharpen your knife with stone. This is super easy to use. It is worth it for sure. Just buy it.

It works fantastic. My sharpening stones are like new again. Very satisfied. Thank you for a good product.

Great product and great prices. I use the sharpening stones already twice and my knife has a great sharp edge again.

The stone comes with 150 and 320 grits. The both cut cleanly and evenly. The gaps seem to well designed to clear material quickly. The 150 side was not flat -- as in a two sheets of paper could slip under a flat edge set diagonally on it. The 320 side was great. I just flattened the 150 side on my driveway.

Works well

Sharpens a Katana in seconds.

I started sharpening knives as a hobby a year ago. I read everything I could find and watched a lot of videos. As I continued to study I realized that I needed a flattening stone. I had purchased some sharp pebble sharpening stones. They seemed good so I bought their flattening stone as well. When I started using the FS I noticed there was a lot of gray slush. As a beginner I thought this is the way it is supposed to be. So I continued to use the stone until this month (January 2026). During this time I used the pencil grid method to check that my stones were flat. But also during this time I was unsuccessful at getting a really sharp edge. Again I figured that was because I was a beginner. Then one day I looked at the FS. I was worn down almost flat. The diamond pattern grooves were gone. I figured I was doing something wrong so I bought a second FS. Right from the beginning there was a lot of gray slush and it seemed to take long time to erase the pencil grid even with the coarse side. I looked at the FS and there was already noticeable wearing down of the grooves. The flattening stone is supposed to be harder than the sharpening stone. This FS is very definitely softer than any of my sharpening stones. This FS is worthless. I wasted a lot of time because I thought my stones were flat and that it was my technique that was bad. It took me a year to figure out that my biggest problem was this FS from Sharp Pebble. I hope this honest review saves others from wasting time.

It is a good stone for keeping your regular sharpening stones in good condition

Não gostei a pedra se desnivela com facilidade. Usei para desbastar uma pedra 5000

Does the job with no fuss. Much easier to sharpen knives with a flat stone to start with

This flattening stone corrected my sharpening stone in just a few minutes work.

I used it to flatten 1200, 4000 and 8000 g. Stones. Works great, the stone is flat and was delivered without any defects. Good size !

I have the Made in Japan 1000/6000 combo King water stone, I was skeptical about this Made in China flattening stone because some comments said the stone wasn't completely flat. But what the heck, I gave it a try... regardless, it did fix the curved surface of my water stone!!! I showed couple photos showing the work in progress. As you can see, the pencil mark on the top and bottom were gone, that means the silicon carbide of the Sharp Pebble was working. Now, I can continue to sharpen the blade of my Japanese wood plane.