This stone and its accessories (rubber frame to hold the stone, flat grinding block) are of quite good quality. The 3000 side will remove very small nicks on kitchen knife blades if you're patient, while the 8000 side will polish the edge to a significant sharpness. I still have a larger 1000 grit stone to remove more noticeable jags and reshape the edge in preparation for the 3000 stone. The quality of the 3000 stone isn't quite there; as it contains small solid inclusions. These inclusions are white in the green matrix of the stone and may be fragments of the 8000 grit side. My larger 1000 grit stone is the King brand and is of higher quality and more consistent than this 3000 grit stone. This one too Stone makes it slightly less than ideal for sharpening knives 7 inches or longer in blade length. I would recommend this stone mainly for paring knives.
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