12k grit size natural whetstone for sharpening, honing. Slurry stone included.
I just lapped it on a piece of tempered glass and worked up to 1000 grit w/d paper. Very nice edge. It took 6 sheets of 120, 2 of 220 & 1 of 600 to get the stone ready for use. One hundred watery strokes to HHT perfection!