... OEM offered 4: Can be designed Tensile steel stamping die mold Tungsten1: High wear-resistant ... Feature1, stamping dies for battery jars, small sized steel balls, screws, screw caps, 2,100% row powder, ... large stress.YM2013.5280085.5For fabricating of stamping dies for watch parts, spring plates of musical instruments, battery jars, small sized steel balls ...