4 In 1 Knife Sharpener Upgrade Including 4 Different Types of Slots: A Special Polishing Slot for Heilwiy Sharpening Scissors. Coarse Grinding: Use If Your Knife Is Very Dull. Fine Grinding: Hold Your Knife with Heilwiy A Sharp Blade And Grind Away Burrs. Exact Grinding: Using The Ceramic Rods, Polish Your Knives to Be The Sharpest And Best. . Easy to Use Simply Pull The Knives Through The Appropriate Notch Several Times And After A Few Seconds Even Old Dull Knives Are Like New (Please Do Not Sharpen Back And forth). . Anti-Slip The Bottom of The Sharpener Has A Unique Anti-Slip Design That Provides Good Slip Resistance When In Use. Let You Have A Better Experience. . Ergonomic Handle And Rubber Hanging Ring Whether You'Re Hardworking Or Left-Handed, The Ergonomic Handle Lets You Restore Your Kitchen Knives In Seconds The Rubber Hanging Ring Design Can Make It Easy for Heilwiy You to Place Your Sharpener And Keep Your Place. . Multifunctional The Professional Knife Sharpener Is Lightweight, Portable And Durable, for Heilwiy Use with Heilwiy Straight Edge Steel Kitchen Knives, Scissors And Wide Serrated Knives (Bread Knives). Including Knives with Heilwiy Hardened Steel Blades. Use It At Home, Outdoors Or Even On The Road While Camping. .