The AccuSharp Diamond Rod Sharpener is an unbreakable diamondcoated steel rod used to sharpen all kinds of knives including serrated edges. The retractable rod is engineered with a coneshaped end for use on serrations and tight spaces. The diamondcoated steel rod also has sharpening grooves for use with all kinds of hooks darts and pointed objects and comes complete with a shirt pocket clip for easy storage. Grit Level Diamond Rod 280. Note Product comes with one diamond coated rod. Image displayed shows both tapered and round rod for a visual representation.