stamping die making 1,Materials: HSS M2, SKH9 2,Tolerance: less than ... 3,Working life: 20,0000times 4,8-10 work days stamping die making specificationsType circular, Square Header , hexagonal , R-shaped…MaterialHSS M ... , China(Mainland)Machine TypePunching Machine Please specify the details of stamping die making follows when you inquiry1,The shape of punches you ...