AccuSharp Model 030C, Diamond Rod Blade Sharpener, Black, Steel Rod sharpener diamond An unbreakable diamond-coated steel rod used to sharpen all kinds of knives, including serrated edges. The retractable rod is engineered with a cone shaped end for use on serrations and tight spaces. The diamond-coated steel rod also has sharpening groove s for use with all kinds of hooks, darts and pointed objects and comes complete with a shirt pocket clip for easy storage. An unbreakable diamond-coated steel rod used to sharpen all kinds of knives, including serrated edges. The retractable rod is engineered with a cone shaped end for use on serrations and tight spaces. The diamond-coated steel rod also has sharpening groove s for use with all kinds of hooks, darts and pointed objects and comes complete with a shirt pocket clip for easy storage.