Spyderco 400F1SP ceramic sharpening steel slip stone

With the Spyderco 400F1SP ceramic sharpening steel slip stone no tools are safe. Because of the special shape it can sharpen most tools and knives. The flat sides can be used to sharpen your knife, the convex side is perfect for serrated knives, the sharp tip to sharpen the teeth of your saw and the cut-out on the convex side is specifically designed to sharpen a fish hook!