Trend CR/DWS/F4/FC CraftPro Folding stone F/C 4 inchCraftPro double sided 4 inch folding stone fine & courseA folding handle double sided diamond 4 inch 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).Coarse ideal for carpentry as it rapidly fixes or restores a damaged edge or blunt tools, including chisels and plane irons.Fine ideal for cabineting making for a fine finish, refines the cutting edges of chisels, small knives, etc Achieves a razor edge in seconds.With plastic ABS folding handle, that folds to protects diamond surface.Oval holes design to collect and hold metal residue. Ideal for saw blades, chisels, knives, domestic and garden tools. Recommended use with Trend lapping fluid to prevent clogging or rusting and assist in keeping tools clean.Specification-Size=89 mm x 20 mm (on 22mm wide base) x 6 mmGrade=Fine & Course Grit=600 & 360 (nom. 25 & 40 micron)