The sharpening stone with a grit of 1000 and 3000 is the most versatile sharpening stone. It is exactly the grain size that allows you to tackle two tasks at once: coarse sharpening (removing micro-errors and wear scars) and fine sharpening (bringing the blade and edge to a flawless condition). Even a beginner can easily use the Japanese Samura sharpening stones. You can sharpen even high-quality knives made of high-density steel in your kitchen.