Blunt knife fine grinding method 1, rough grinding knife straight into the rough grinding mouth (by the handle groove), a little hard to pull back and forth about 5 times 2, fine grinding blade straight into the fine grinding mouth (middle slot), easy to pull back about 3 times 3, fine grinding knife straight into the fine grinding mouth, easy to pull back about 3 times Due to the knife material, angle angle is different, such as sharpening effect is poor, it is recommended to continue with coarse grinding grinder And gradually increase the strength to observe the effect, and even back and forth grinding more than a dozen times Brand: RYBACK Name: sharpening device Material: stainless steel + ABS plastic Specifications: 20.5CM * 4.8CM * 7.5CM Weight: 198 grams Process: UV surface platingRyback