Naniwa S2-404 Super Stone 400 Grit Japanese Whetstone Knife Sharpener CPM-20CV has a high volume

CPM-20CV has a high volume of vanadium carbides and a high amount of chromium

Some cooks like to use it in their hand

Blade steel: Sleipner 60-61 HRC (Black Mil-Spec Coated)

Designed by James Williams in Vass

Naniwa S2-404 Super Stone 400 Grit Japanese Whetstone Knife Sharpener CPM-20CV has a high volumeNaniwa's Super Stone is their high end whetstone manufactured in Japan under thorough quality control using high grade materials. 400 Grit 210 x 70 x 20 mm Instructions: Splash stone with water before sharpening and continue to do so when sharpening. Naniwa Super Stones do not need soaking as they have tightly resin bonded particles, making them more durable and effective than other makes. Made in Japan