Professional Sharpener: The main body is made of high quality stainless steel and ABS, which has excellent durability, durable and can be used for a long time. According to ergonomic points of view, the bottom is made of a non-slip silicone mat which significantly improves the friction with the contact surface. 4-level system: knives are essential for preparing delicious dishes, but the sharpening gradually deteriorates. In this case, the sharpness can be reproduced with a sharpener. Coarse sanding, fine sanding, fine sanding and scissor sanding. Chipping can be oriented to repair damaged inserts. Quick sharpening: Insert the knife into the sharpening mouth, exert a suitable force evenly in one direction, press three to four times in the mouth, and adjust the clarity within seconds (about 10 seconds). By uniformly exerting a suitable force in the same direction and pulling 3-4 times, clarity can be restored within seconds. Wide application: sharpening knife suitable for many tools. For the extracts: chef's knife, kitchen knife, fruit knife, scissors, kitchen knife, bone knife and water knife. Note: do not use on hunting blades.