The Metabo HSS-G Drill Bit Set suitable for drilling steel and cast steel, alloyed and unalloyed, grey cast iron, malleable cast iron, ductile cast iron, sintered iron, nickel silver, graphite, non-ferrous metals, and plastic. Up to 900 N/mm tensile strength. The bits have been ground with a cylindrical, DIN 338, type N, 135 crosswise grinding tip. They are supplied in a metal tin and it contains one of each size 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5 & 13mm.