A Lansky extra-coarse alumina-oxide hone, 70 grit, for the controlled-angle kits. Lansky's grit article: the 70-grit extra-coarse hone reshapes and repairs heavily chipped and damaged edges. It is the extra-coarse stone in the Deluxe 5-Stone System. Clean alumina with a few drops of honing oil when filings clog the surface; oil is not required to cut.
Use it when the edge is wrecked, then move up in grit.
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