and thermal and chemical resistance

#1 - hard stone for fine sharpening

this is not a defect

Hapstone R2 Standard is the mainstream kit in the sub-$300 price segment

atago stone edge pro and thermal and chemical resistanceAtago 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