The three-in-one knife sharpener has two pre-angled sharpening stones. One of the stones is ceramic and the other is carbide. The carbide edge can provide you with a quick sharp edge and the ceramic sharpener can give you a finer, razor-sharp edge. Additionally, there is a fold-out, diamond coated tapered rod for sharpening serrations or small gut hooks. The three-in-one knife sharpener is lightweight and includes a lanyard hole for easy carry.