Super whetstone for rough sharpening

As a pioneer of abrasive products, Naniwa Whetstone has gained a lot of trust due to the advanced manufacturing technology and high quality that we have cultivated so far.
Product Specifications
Granularity: #220
Whetstone size: 210 x 70 x 20 mm

Granularity: #400
Whetstone size: 210 x 70 x 20 mm
Precautions for use
Soak the stone in water for 5 minutes before using it. Allow the stone to dry completely after use. Putting the stones back into the box while wet can reduce their quality.