Dual Grit Ceramic Stone, Blue Coarse Grit with White Fine Grit Dual Grit Ceramic Stone, Blue Coarse Grit with White Fine Grit SSDGRIT The Dual Grit Ceramic Sharpening Stone features a blue coarse side for recontouring and a white side for finishing and honing. 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.