10 Piece HSS-R Metal Drill Bit Set . Metal Drill Bit particulary flexible and resistant to breakage. For use with most metals, both ferrous and non-ferrous. Longlife and precision jobber drill bits. Shank equal to drill bit diameter and rolled spiral flute with ground point, vapour-plated. Two-cutter, cylindrical, with two flutes. Kit Consist: 1/2/3/4/5/6/7/8/9/10 mm