Bought 3 of these to sharpen knives, now I regret not ordering more, I'm not a pro at sharpening knives, just tried, gave me a great result, with some practice knives they will be razor sharp, I have sharpened 2 knives and the stone still looks new and I have used it extensively. Update: This product is really high quality, it has lasted quite a while and as I mentioned I have used it aggressively to see how it holds up, this is a great buy for a low price.