... surface, horizontally, vertically even upside down. The tungsten carbide blades adjust to sharpen knives, scissors, shears, and cutting tools ... , horizontally, vertically even upside down. The tungsten carbide blades adjust to sharpen knives, scissors, shears, and cutting tools ... serrated knives, kitchen shears, scissors and all blades Get the sharpest edges possible. samurai pro knife sharpener