Gatco 16001 Diamond Sharpening Hone/Coarse Grit by Gatco Sharpeners

it cuts faster than the extra coarse stone I used before purchasing this. I keep my own knives in good enough shape that I do not need this coarse a hone, but it is very useful for sharpening other people's dull knives and for some new knife blades that are not properly sharpened.