Idahone Ceramic Stone 4" x 1"


Grit: Medium


Abrasive Sintered alumina ceramic
Available Grits 📊 Grit Chart Estimated
800 JIS M
2000 JIS F
3000 JIS EF
Bonding No bonding
Country of Origin USA
Extra Material Mounted on aluminum blank
Form Factor KME
glgc idahone
Lubricant Oil or WD-40
Thickness of Abrasive 5-6 mm
Total Thickness 9 mm
Working Surface 100 x 25 mm (4" x 1")


Idahone Ceramic Stones are used for sharpening knives using KME or Hapstone knife sharpener. The stone has an extremely high hardness rating.

Idahone Ceramic scarcely wears over time. Ceramic stones are available in three grits: medium, fine and ultra-fine. Ultra-fine ceramic stones utilize the top quality 99.5% alumina and provide a super finish for the cutting edge.

Idahone Ceramic stones should be used with oil or WD-40 as a lubricant.

Idahone Ceramic stones do not require any preparations.

Advantages of aluminum blanks

  • If you accidentally drop the stone, it's less likely you break it;
  • Much longer life span for the stone after multiple flattening and lapping;
  • Easy identification due to laser engraving;
  • Reliable clamping for stones of imperfect shape.

Stones mounted on aluminum blanks are thicker than stock KME stones. We recommend using the thickness compensator if you use stones of different thickness.

Watch KnifeKrazy YouTube review of the new form-factor.