Natural sharpening stone 10cm

For the Opinel Knives to cut more
To sharpen your knives easily.
A natural stone from Lombardy, 10 cm long. To use it wet, the stone must form an angle of 20 degrees with the blade. This will revive the knives you use most.
  So you can sharpen your knives easily. These stones are known since the fifteenth century for their abrasive qualities. Made of quartz and coal, they allow to recover the net and precise cut of the utensils.