Trend DWS/MF/FC Double-Sided Machinist File, Fine/Coarse 600 grit (25 micron) side and a 300 grit (50 micron) side offers capacity to produce fine razor edges or for coarse applications such as deburring edges Grit sizes are clearly marked on handles to avoid confusion Overall length is 7 inch Suitable for woodturning gouge internal and external bevel edges, skews, carving tools, model engineering, routers, saw blades, small chisels, knives, serrated edges, metals and plastics, pruners, shears and all shaped tooling Apply gentle pressure during sharpening process with minimal amounts of Trend lapping fluid for optimum performance