
We have a small set of 4 ceramic knives that I wanted to see if I could get them a little sharper. I used both coarse and fine diamond blades on all 4 knives in the set. The knives are a little sharper than when I started, but not nearly as sharp as the steel knives I've sharpened with standard belts. It's really hard to tell the difference in a knife blade before and after it's been sharpened with these belts. If you buy them, don't expect much from them.

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