The FDD sharpener is a foldable two sided sharpener with diamond on both sides. The fact that this whetstone has foldable handles means that you can sharpen your knife without risking cutting yourself. As we get better and better knife steels, which are both stronger and harder, even greater demands are put on the tools we use to process these knives. Based on our long experience in staying in the woods, we believe that the diamond sharpener is the absolutely best tool for standard knife sharpening. Even if a diamond whetstone gets worn, it remains flat and that is a great advantage in the long run when sharpening knives. In addition, the diamond whetstones are fast in their action, you get a new edge very fast. No oil or water is needed either.
The yellow surface consists of titanium aluminum nitride which greatly prolongs the life of the sharpener. You use the fine side (44 microns) if you have received a real edge damage, the super fine side (25 microns) for normal edge sharpening. The whetstone comes with an instruction in English on how to use it. For cleaning, use some washing-up liquid and hot water. Like all diamond sharpeners, this whetstone is a bit rough at first but gets smoother after a period of use. When you have sharpened your knife many hundreds of times you shall consider sending the knife to us for applying a new factory edge. Please note that we are grinding Fällkniven knives only.