Automatically adjusts to sharpen different blade grinds. Restores a sharp edge in just a few passes and lasts for years. Two slots ensure proper positioning for optimal blade sharpening. Finger indentations offer a comfortable, secure grip when you are sharpening. Lightweight, compact design provides easy storage and transportation. Sharpens left-handed scissors as well. *Not for use with pinking shears or scissors with serrated blades.