2.15MM METRIC, HIGH SPEED STEEL, JOBBER LENGTH, DRILL BIT. DECIMAL EQUIVALENT- .0846 FLUTE LENGTH- 29MM OVERALL LENGTH- 53MM A DEPENDABLE, GENERAL PURPOSE DRILL DESIGNED TO PERFORM IN A BROAD RANGE OF MATERIALS IN THE IRON AND STEEL FAMILIES. IDEAL FOR PRODUCTION, MAINTENANCE OR PORTABLE DRILLING JOBS. SURFACE TREATED WITH ABRASION -RESISTANT BLACK OXIDE.