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. Coarse Carbide slot Ceramic slot for fine edge sharpening Tapered diamond coated rod for sharpening serrated & straight edges Compact design with lanyard loop