Precise multi-progressive dies 1. Structure: splitting and inserts compound. 2. Material of punch -matrix: various import hard carbide. 3. Form style: punching, bending, stretching, side blowing and side loose core can be finished in one die. 4. Precision: ≤0.005mm. 5. Working condition of die sets: used in high speed punching machine, within 250-600 punches/min. 6. Totals life span: 50,000,000punches- 100, 000,000punches.