JB74 Crystolon machine knife sharpening stone at 4 inch diameter by 1-1/2 inch thick. Silicon carbide grain sharpens industrial machine knives, paper cutter blades, and food processing slicer blades...
MF214 round India sharpening stone at 4 inch by 1/4 inch in medium grit. Aluminum oxide grain shapes and sharpens cutting tools, reamers, and curved cutting edges. Round cross section fits internal...