The AccuSharp Diamond PRO 2-Step Knife Sharpener features pre-angled coarse diamond and fine ceramic rods to sharpen, restore, and then polish a blade?s edge. One of our newest ?award winning? designs, the diamond rods are aggressive enough to sharpen all types of steel. The flip side consists of two ceramic rods used to finish and polish the edge for a smooth, sharp finish. The Diamond PRO 2-Step exterior is made of brushed aluminum and finished with a rubber molded grip and rubber feet for safety. The unit has a lanyard hole which allows for easy attachment to cord or string..