The MF-134 Triangular India Stone is a precision sharpening tool measuring 4 inches by 3/8 inch with a unique triangular profile for versatile blade maintenance.MF-134 Triangular India Sharpening StoneDimensions: 4" x 3/8" triangular profileIndia stone composition for effective sharpeningCompact size ideal for detailed sharpening workTriangular shape allows access to tight angles and groovesPerfect for sharpening knives chisels and other cutting tools where precision and access to angled surfaces is required. The triangular design makes it especially useful for sharpening serrated edges and pointed tools.