Lansky Spyder Sharpener Medium Grit LS41 Sharpens uniquely serrated Spyderco brand knives and other serrated blades. This handy pocket size sharpener is specially designed to match the unique blade serration patterns found on Spyderco Brand knives and other serrated blades. There is a flat surface for sharpening regular blades, and a groove is for fish hooks and other pointed objects such as darts. About 4 1/4" overall. Colors may vary - our choice please. USA