The Irwin 19 Piece Metric HSS Professional Drill Bit Set offers industrial quality with outstanding performance and a long service life. Suitable for drilling steel and steel castings, alloyed and non-alloyed steel, cast iron, non-ferrous materials, plastics and other materials. The 118 split point shape provides optimum centring when starting and a faster drilling rate. Supplied in a hardwearing metal storage case. Sizes: 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 and 10mm.