The AccuSharp DiamondPRO 2-Step Knife Sharpener features pre-angled coarse diamond and fine ceramic rods to sharpen, restore, and then polish a blades edge. The diamond rods are aggressive enough to sharpen all types of blades. The flip side consists of two ceramic rods used to finish and polish the edge for a smooth, sharp finish. The unit has a lanyard hole which allows for easy attachment to cord or string.