Cold Steel 3-IN-1 Knife Sharpener, 3.2 Overall Length, GRN Black Handle CS-KS-31SCDR The Cold Steel 3-in-1 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.