The accusharp diamond pocket stone is a dual-sided pocket sharpening stone featuring a 320-grit coarse diamond surface used for more aggressive sharpening, plus an 800-grit fine diamond surface used for honing and finishing.The diamond pocket stone also has a groove used for sharpening all kinds of hooks and darts.The pocket stone comes complete with a handy accusharp carrying pouch with belt loop.Sheath: NylonSharpener Material: DiamondSharpener Type: Fine, Coarse