Unique design that combines every sharpening necessity into one pocket-sized unit; Coarse tungsten carbide sharpening blades to sharpen all types of steel; Fine ceramic rods to hone and polish your sharpened edge; Includes a 2.5" long retractable diamond tapered rod used for deep serrations; Rod also has a groove for sharpening all of your hooks and darts; Comes with a 3" retractable flat diamond stone for users who prefer a continuous surface for their sharpening needs