It has a convex edge on it. All you need in sandpaper and a phonebook, egg carton, or a mouse pad. I use a 1/8" thick mousepad and a few pieces of sand paper. I start convexing with 150 grit emory cloth, then 400 wet/dry, 600 w/d, then finish off on 1500 w/d. I strop it on a old leather belt and finish it off on a piece of the same belt cured with the green compound. Thanks Richard J for that! haha but If it's blunt, bring it back down to 400 grit and take your time. Quick back and forth motions work for me. Try and keep a constant angle. You can be a bit sloppy with convex edges but go to too high and make a butter knife. It's best to keep it around a 20* angle and do about 45 seconds of quick back and forth strokes on one side, and do it on the other side. As I said, this works for me. Another method might work for you. You are the sharpener, not the equipment.