#1 - hard stone for fine sharpening

It is preliminary lapped to ultra-fine grit

Hindostan is preliminarily lapped and does not require lapping after purchase

Spring-assisted stoppers

Arkansas stones consist of silica

atago stone edge pro #1 - hard stone forAtago Whetstones are used for finish sharpening on Hapstone and Edge Pro knife sharpeners. Atago () Whetstone is mined in Japan. Atago is ultra fine natural stone with the LV4 hard rating. Atago stones are universal and can be used to sharpen knives of any steel. Atago is preliminarily lapped and does not require lapping after purchase. Atago should be used with water as a lubricant. All that is required is to wet the stone surface. There is no need