The Naniwa Premium Diamond Stone #10000 is a high-end Japanese sharpening stone designed for ultra-fine finishing and mirror polishing of knives, chisels, Japanese planes, and other cutting tools. Its #10000 grit allows for an exceptionally precise edge on the hardest Japanese steels and modern alloys.

Its sintered diamond surface offers excellent wear resistance, smooth gliding, and long-lasting performance without the risk of flaking. Usable simply with water, without soaking, it comes with a dressing stone to maintain a perfectly flat surface.