DUAL STONE Series-
The whetstone that has lost fine voids as much as possible by manufactured in baking method.
It has both property of hardness of Oilstone & grinding power of Water whetstone.
Easy to grind by only putting the few drops of oil or water on the surface and start sharpening.
If you are in the place like there has no oil or water, you can even sharpen your knife by saliva.
This is the best stone for small knife & scissors. You can also sharpen knives or fish hooks in outdoors if you keep this stone in your pocket.
Serrated edge are also sharpenable by using side of comb shaped whetstone.
It's easy using, you don't need to soak it in the water or oil before grinding as like whetstone from the past.
https://www.youtube.com/watch?v=U7jDgIXmyN4#t=165

Brand : SUEHIRO
Type : Rough(Arato)
Stock number : DS600K
Grain Size : #600
Stone size : 115x38x9（3）mm
JAN code : 4966684070011
MADE IN JAPAN

Order to maintain a good sense of sharpening, please clean the surface by flushing mud with a water, and use Surface modification grindstone after use.