Spyderco Triangle Ceramic Stones are used for sharpening serrated knives on Hapstone and Edge Pro knife sharpeners. Spyderco stones are made of alumina ceramic with an extremely high hardness rating. Spyderco Ceramic scarcely wears over time.
Spyderco Ceramic Stones are available in Medium (estimated 600 JIS), Fine (estimated 2000 JIS) and Ultra Fine (estimated 5000 JIS) grits.
Spyderco Serrated Ceramic stones are made of Spyderco triangle hones for Tri-Angle knife sharpener. Spyderco Ceramic stones should be used with oil as a lubricant (oleic acid, WD-40, refined olive oil).
If you have a question regarding this product, please feel free to ask.