The Gatco Super Micro X Knife and Serration Sharpener has two grades of abrasive sharpening rods. The medium grade dark rods should be used first to reshape the bevel of a dull blade. The white, ultra fine rods are provided to put the final polished sharp edge on the blade. Sharpens plain and serrated blades. Two Medium sharpening rods. Two Fine rods. Preset sharpening angle for easy use. Slip resistant grip pads. Compact and lightweight. Fast, safe and easy to use. Alumina ceramic sharpening rods. Key ring hole. Compact 2x2x0.5. Wt. 1 oz. Import.