New whetstones from the Seki Magoroku series realize perfect sharpening quickly.
Each whetstone is very hard and has a high resistance to wear, therefore there is little transformation in the stone from use. This allows easy and accurate sharpening.
All Seki Magoroku whetstones are made from White Alundum.
Combination whetstone of 240 and 1000 grit. 240 Grit is for rough speedy sharpening and 1000 Grit is for finishing.