METAL DRILL BIT 4.2MM HSS-CO COBALT DIN338

- 5% cobalt alloyed jobber drills with high heat-resistance for drilling steels - with tensile strength over 800 N/mm² - specially suitable for high alloyed steels, bearing-steels, hot/ cold-rolled steel - highly accurate: special shape, drills without center-punching - break resistant thanks to CNC heat treatment - industrial quality: suitable for NC machines - Ø 4,20 mm - overall length 75 mm - thread length 43 mm