Craftpro-Credit-Card-Sharpening-Stone-Trend-CR-DWS-CC-FC-p-The-Trend-CR-DWS-CC-FC-is-a-double-sided-credit-card-size-diamond-stone-It-has-monocrystalline-diamonds-for-fast-clean-stock-removal-&-excellent-sharpening-performance-p-p-Double-sided-for-coarse-sharpening-&-fine-honing-Coarse-360-grit-nom-40-microns-&-fine-600-grit-nom-25-microns-p-p-Ideal-for-fluted-shaped-&-small-router-bits-carbide-or-HSS-turning-tools-chisels-plane-blades-carving-tools-&-all