METAL DRILL BIT 4.2MM HSS-CO FORTE COBALT DIN338, ALPEN

- 5% cobalt alloyed jobber drills with extremely sturdy construction (reinforced web) for drilling under difficult conditions eg. poor chip-removal and deep holes, for use in steel and cast-iron - with tensile strength up to 1000 N/mm² - faster: thanks to special shaping of flute and point - deeper: thanks to large chip spaces - highly accurate: special shape, drills without center-punching - nitrided surface - Ø 3,50 mm - overall length 70 mm - thread length 39 mm