Naniwa professional series is the highest quality stone from Naniwa.They are very dense/hard, which means less dishing, and more steel cutting and polishing properties.

Care for your whetstone:

-This stone only requires a splash of water to start, and the same during the sharpening process.

-Keep stone flat with a truing stone.

-Keep stone clean with nagura stone.

-Wipe stone clean of excess water, dry at room temperature.

-Store at room temp. Keep away from hot and freezing temperatures.