The Senken Rolling Knife Sharpener is the easiest and most satisfying way to sharpen your kitchen knives. No need to master traditional sharpening or use a knife sharpening service - with the Senken Rolling Knife Sharpener, anyone can get their kitchen knives factory-sharp from the comfort of their own home in just minutes. The Rolling Knife Sharpener is dual-sided, containing 2 discs that allow you to both sharpen and hone your knives: 1) Diamond Sharpening Disc (300 Grit) - Use this end to sharpen your knives. 2) Ceramic Honing Disc (1000 Grit) - Use this end to hone your knives. The Rolling Knife Sharpener also includes a 4-sided base with 4 different sharpening angles: 15°, 18°, 20°, and 22°. The sharpener conveniently fits inside the center of the base for easy storage of the rolling knife sharpening system.