This electric knife sharpener is made of PP and diamond grinding wheel, with a 2 stage design that can sharpen and polish knives, delivering a sharp, burr-free edge. It also works on scissors and has a maximum power of 50W. It's easy to use and perfect for home kitchen use. Note: works on stainless steel knives only. Features: 1. As Sharp As New: Our electric knife sharpener is designed for home & kitchen use, bringing you professional results conveniently at home. Works on stainless steel kitchen knives, but not ceramic or serrated. 2. The Correct Sharpen Steps: Obliquely insert the dull knife and closely touch the outside wall, and then pull it from outside to inside to sharpen. 3. 2 Stage Design to Sharpen & Polish: Professional 2 stages sharpening system for crude and fine can perfectly satisfy your knife sharpening needs. The crude stage can sharpen knives quickly, and the fine stage can polish them more smoothly, delivering a sharp, burr-free edge. 4. 3 in 1 Multifunctional Knife Sharpener: Besides sharpening kitchen knives, S820 also can sharpen scissors. 5. Usage Tips: We recommend no more than 10 minutes of use at a time, or it will cause the motor to overheat and quit working. The exact time will vary depending on the weather and temperature. Specification: Material:PP + Diamond Grinding Wheel Product Color: Black, Blue Product Size: 22 x 8.5cm Product Weight: 350g Power: 50W Frequency: 50Hz Package Included: 1 x Electric Knife Sharpener