Lansky Sharpeners Standard 3-Stone Controlled-Angle Sharpening System

Safe, easy, and convenient to Use. This sharpening system is designed to give your blade a professional, razor sharp edge every time. The Lansky Controlled-Angle Sharpening System allows the user to select the sharpening angles that are best suited for their knife's intended use. The four sharpening angles are 17, 20, 25, and 30 degrees.