SHAPTON Professional Series Kuromaku 12000 grit, Fine Grit Sharpening Stone
Professional grade ceramic whetstone 8.27 inch X 2.76 inch X 0.59 inch
The plastic box is able to be a whetstone holder, when the stone puts on the top of the plastic box. It is fine grit stone to finish high quality cooking knife, carpentry cutleries, and razor blade.