Features: 1) Specification: high speed progressive dies 2) Applicable to silicon steel sheets or thin boards with thickness of 0.3 - 0.65mm for high speed crushing 3) Crushing speed: 200 - 500 times/ minute 4) Life: 0.12 billion times 5) The blades are all made of imported tungsten steel 6) Making cycle: 45 - 75 days