Gritomatic Aluminum Oxide Sharpening Stones are used for sharpening knives using KME or Hapstone knife sharpeners. The stones are made of aluminum oxide and are designed for soft or medium steels (up to 59 HRC). All stones are 6 mm thick.
It is advisable to use aluminum oxide stones for sharpening knives made of soft stainless steel: 1095, 1080, 1070, 1050, 420, 440A, 440B, 3Cr13, 8Cr13MoV, 8Cr14MoV, 9Cr14MoV, AUS-4, AUS-6. Using aluminum oxide stones to sharpen knives made of hard steel is not recommended because of low performance.
Gritomatic synthetic stones made of silicon carbide and aluminum oxide can be labeled in either FEPA-F or JIS grit scale. To make grit uniform and customer-friendly, we have started transition to the japanese (JIS) grit scale for all Gritomatic waterstones. Old naming: F 120, F 220, F 400, F 600, F 1000. New naming: 120, 240, 600, 1000, 2500.
Gritomatic Aluminum Oxide Stones are preliminary lapped and does not require lapping after purchase.
Gritomatic Aluminum Oxide Stones are recommended to be used with water as lubricant. Soak the stone for 1-2 minutes and splash water on the stone's surface to prevent drying.
If you have a question regarding this product, please feel free to ask.