4-Stage Manual Sharpener: The knife sharpener includes coarse grinding, fine grinding, and polishing. Slot 1 for tungsten rod is for scissors. Slot 2, diamond-coated, is for dull metal knives; Slot 3, tungsten steel, is for coarse grinding, perfect for kitchen knives; Slot 4, ceramic rod, is for finishing and polishing edges, suitable for light sharpening of sharp knives. ERGONOMIC DESIGN: The sharp knife sharpener features a comfortable handle for maximum grip, suitable for both right and left-handed users. Sturdy, non-slip rubber base for ultimate stability and safety – any flat surface in your kitchen will work. Easy to Use: Place the knife in the sharpening slot, then sharpen in one direction and repeat 3-5 times (please do not sharpen back and forth). Durable and High-Quality Material: The main body of the knife sharpener is made of solid ABS plastic. The non-slip rubber base ensures ultimate stability and safety, preventing the knife sharpener from slipping. Wide Range of Applications: The knife sharpener is perfect for daily use. Whether in the home kitchen or outdoor camping, this knife sharpener can make your knife sharper in no time. Note: All dimensions are measured manually; please allow an error of 1-3 cm due to differences in lighting and display. There may also be slight color variations; please refer to the actual item received.