[Usage of Knife Sharpener] Turn Dull Knives Sharp - First, coarse sharpening. Place knife on the first sharpening slot, using slight downward pressure, run the blade from its heel to its point through the slot. Repeat three to five times. Then, repeat the process on the second sharpening slot.[Kitchen Knife Sharpener] Versatile & Easy to Use - Just 3 swipes with a highly efficient blade sharpener make old knives cut like —in seconds. IDEAL for chef's knife, butcher knife, hunting knife, pocket knife, and more. (except scissors and fine-toothed knives)[Best Knife Sharpener] Save Time & Money - Comes with a sharpening guide. Quickly and effectively restore knives to a razor-sharp edge. Get professional results in seconds. The perfect addition to most kitchens. Extend the life of your existing cutlery.[Chefs Choice Knife Sharpener] Superior Sharpening Performance - Features diamond and ceramic abrasives tested for durability. Made with high-quality materials to deliver long-lasting, reliable performance. Restores knives to like-new condition.[Kitchen Portable Knife Sharpener] Safety & Portability - Designed with user safety in mind. The non-slip suction base securely attaches to smooth surfaces such as countertops, ensuring stability during use. Allows for one-handed operation and helps protect hands from accidental slips or cuts.