This Extra Coarse grade DMT F70 Diamond Whetstone in black delivers maximum material removal for the most demanding restoration work. The 220g extra coarse grit is designed for heavy-duty edge repair, removing significant damage, and reshaping badly worn or damaged blades. Ideal for tackling severely dull or damaged cutting edges that standard stones can't handle efficiently, this variant makes quick work of major restoration projects. Whether you're dealing with chipped blades, rounded edges, or tools that haven't been sharpened in years, the extra coarse diamond surface removes material rapidly whilst maintaining flatness and precision. The black colour coding immediately identifies this as your most aggressive sharpening option. The flip-open handle provides leverage for effective material removal, whilst the compact folding design protects the diamond surface when stored. At 140mm when opened, it offers sufficient working surface for restoration work on pocket knives and small hand