Sharpening Stone, Ceramic, Medium Grit Sharpening Stone, Ceramic, Medium Grit SS3C The Flat Ceramic Meduim Grit Sharpening Stone is used for routine sharpening procedures. Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.