4" Ceramic Stone 800 grit

These superior stones use real diamonds permanently bonded to a stiff steel plate so they cut faster, last longer, and never "cup". The diamond grit used on these stones is tough enough to sharpen carbide and any hard tool steel. No fluid is required during use. Use the Fine (800 grit) for general use & Super Fine (1,200 grit) for final sharpening to a razor edge.