Coarse- Quickly restores a dull edge to cutting sharp again. Customers that desire cutting fast action without worry of edge refinement often use our coarse models. Diamond size: 45 micron / 325 mesh
Extra Coarse- Recommended for aggressive removal of metal on damaged tools or for heavy-duty outdoor tools such as axes and lawn mower blades. This grit is great for flattening Japanese waterstones and is also commonly used as the first step in flattening the backs of chisels and plane irons and for rapid stock removal from a chipped or badly damaged edge. Diamond size: 60 micron / 220 mesh.