4.75MM METRIC, HIGH SPEED STEEL, JOBBER LENGTH, DRILL BIT. DECIMAL EQUIVALENT- .1870 FLUTE LENGTH- 59MM OVERALL LENGTH- 86MM 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.