The Bosch HSS PointTeQ Twist Drill Bit Set 19 piece high speed steel drill set covering main popular diameters from 1mm through to 10mm packed into a tough plastic case with sized clearly shown for accurate replacement in the case and safe storage. The Drill Bit Set gives the trade increased chip removal assisted by the black-oxide coat on the flutes and 135 degree tip designed for drilling clearance and pilot holes through alloy and non-alloy steel non-ferrous metal cast iron cast steel plus plastics generating less heat and wear at an increased drilling rate.