A plant-based, food safe oil, ideal for maintaining the full range of Opinel knives. Use the Opinel Maintenance oil to grease blades and condition wooden handles or cutting boards. Use instructions: after cleaning and drying your knife with a soft, dry cloth simply apply a few drops of oil to a clean cloth and rub on the blade. Allow the blade of a folding knife to dry completely before closing it. To condition wood handles evenly, use a cloth with a few drops of oil applied.