The Trend CR/DWS/CC/FC is a double-sided credit card size diamond stone. It has monocrystalline diamonds for fast, clean, stock removal and excellent sharpening performance. Double sided for coarse sharpening and fine honing. Coarse 360 grit (nom. 40 microns) and fine 600 grit (nom. 25 microns). Ideal for fluted, shaped and small router bits, carbide or HSS, turning tools, chisels, plane blades, carving tools and all general tooling. Recommended for use with Trend lapping fluid to prevent clogging or rusting and assist in keeping tools clean.