Smith's Pack-Pal 4" Diamond Combination Sharpener features coarse and fine grit sharpening surfaces. These surfaces contain multiple layers of micron-sized monocrystalline diamonds and a unique sharpening surface with an overlapping oval hole design. This innovation speeds sharpening by collecting and holding the metal filings which ordinarily build up during the sharpening process. Each stone has a "micro-tool sharpening pad" and a sharpening groove for fishhooks or pointed tools. The sides of the sharpener include a ceramic rod for that razor-sharp edge and a fire starter. The soft grip rubber handle is designed to make sharpening safe and easy, and when you are finished