A CraftPro Range double sided credit card size diamond stone.|Monocrystalline diamonds for fast, clean, stock removal.|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 & small router bits, carbide or HSS, turning tools, chisels, plane blades, carving tools & all general tooling.|Recommended use with Trend lapping fluid to prevent clogging or rusting and assist in keeping tools clean.