Shapton RockStar 60107 extra fine, J4000 grit, 3 micron, sharpening stone

The Shapton RockStar 60406 fine, J3000 grit, 4 micron, sharpening stone is a fine sharpening stone from 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! The 4000-grit side is extra fine and ideal for sharpening your Japanese kitchen knives to a razor-sharp edge.