Shapton Glass Stone HR grain 4000 fine 3.68 micron sharpening stone, 50103

You use this Shapton Glass Stone Grain 4000 to sharpen your already sharp knives. The sharpening stone sharpens quickly and evenly. Which is exactly what we're looking for from a high-quality sharpening stone. Contrary to what you might expect from the name, the glass doesn't do the sharpening. You sharpen on a high-quality Japanese whetstone. A layer of tempered glass is attached to this to prevent bending.