Sharpness, rated in numbers.🔪✨ 切れ味、数値で見るとこうなる｜砥石別 Whetstones Used Rough whetstone 400 grit Medium whetstone 1000grit Fine whetstone 6000 grit Extra fine whetstone 13000 grit Leather strop #knife #sharpening #sharpener #asmr #研師Ryota