2-STAGE KNIFE SHARPENER: Stage 1 quickly and easily sharpens and restores the edge and reshapes the angle; Stage 2 precisely sharpens and polishes the blade, completing the sharpening process. NOTE: Not suitable for serrated knives. DIAMOND ABRASIVE: Secura electric knife sharpener with diamond abrasive, which is the hardest natural substance that can sharpen the edge quickly and easily to create razor-sharp edge. PRECISION GUIDES: The precision guide keeps your knives at the optimal angle, easily converting a 20-degree knife into a finer 15-degree edge for a sharper edge, making it an ideal and efficient choice for your kitchen. STRONG & SAFETY: Secura Kitchen Knife Sharpener With heavy-duty non-slip suction cup feet keep the sharpener firmly in place during use to prevent mishaps.