SHAPTON Ha No Kuromaku Ceramic Whetstone (C-set) Fine Grit (#5000) + Fine Grit (#12000) Best set of whetstone! Good choose for kitchen knife, precision tool, sushi knife and so on Fine Grit (#5000) is used for sharpening, and Fine Grit (#12000) is good for fine honing Stones are colored with matching ventilated plastic boxes which also serve as stone holders Working surface: 8-1/4 x 2-3/4 x 1/2 in. (210  70  15mm)