A compact field sharpener that offers more precision than pull-through sharpeners. It consists of three sharpening surfaces: 220-grit, 600-grit, and ceramic. Simply rotate the barrel to expose the sharpening surface you want to use. Three rotating sharpening surfaces: 220-grit diamond carbide for coarse sharpening 600-grit diamond carbide for refining edges Ceramic rod for fine-tuning 20-degree edge angle guide to make sure you're consistent Fits in your pocket or pack Made in China Simply rotate the rod to work through each level of sharpening. Start by using the 220-grit diamond surface to sharpen a dull edge. Twist the sharpener to 600-grit to refine the edge. Then finish up with the honing rod to align the edge. The frame doubles as a built-in 20-degree edge angle for keeping the angle precise.