Innovative knife sharpener for left and right-handed use. Two levels are available for sharpening knives, depending on how much cutting performance has been lost. The first level “Coarse”, is recommended for when the knife is blunt. The second level “fine”, is suitable both for fine sharpening following on from the first level or for regular resharpening of the blade. Knives with a serrated edge should only be sharpened using the second level in order to remove any burrs that have developed. As the device produces a cutting angle of approximately 30 degrees, it is suitable for sharpening all sorts of different knives. The rear end of the blade is placed between the slats and pulled gently through to the tip, keeping the blade straight. In order to achieve the best possible result, the knife blades should be cleaned before and after every grinding process.