[ SAFETY WITH SILICONE MAT ] Slip-resistant silicone rubber base and Bamboo base ensures non-slip grip keeping the whetstone firmly in place, so you never have to worry about it slipping off. a. [3000 Grit Coarse Side] The lower grit 3000 coarse grit side allows you to quickly remove the dull edge, coarse grinding, used to repair the seriously dam aged edge, suitable for blunt knives b. [8000 Grit Fine Side] The higher grit 8000 grit is designed solely for polishing the knife after sharpening.
eBay