1) Excellent quality including good sharpness. 2) High resilience and long life. 3) Screws work with both straight and cross
NOTE 1. These blades are very sharp, so please note this when mounting, and keep away from children. 2. If the blade is uneven and unclean, we suggest that you change the blade in time. 3. If you change the blades, we recommend you to change the screws together.