Shapton RockStar 60305 coarse, J320 grit, 40 micron, sharpening stone

The Shapton RockStar 60305 coarse, J320 grit, 40 micron, sharpening stone is the coarsest sharpening stone of the Shapton RockStar series. These sharpening stones are made of high-quality white aluminium oxide. This is a synthetic, ceramic material that is incredibly tough, and can accurately be produced in an exact grain size. The result? Very consistent sharpening results! You use a coarse sharpening stone for sharpening very blunt or even damaged knives. Or if you want to change the sharpening angle of the knife.