Accusharp Diamond Compact Sharpener Steel. One of the four "flat" surfaces of the diamond sharpener is resharpening a dull hook or pin point. The other two surfaces are for knives and tools that need a standard or fine sharpening edge. A center groove for sharpening hooks is part of the grooved surface. A cleaning rod helps to clean the steel rod as it is used. Comes with a holster pocket clip or hang packaged. Specifications for Accusharp Diamond Compact Sharpener: Manufacturer: AccuSharp Blade Material: Steel Package Contents: Accusharp Diamond Compact Sharpener Accusharp 050C: Diamond Compact Sharpener Steel