Rolson 48336 HSS Drill Bit Set 13PcManufactured from HSS material and ideal for drilling metal. Sizes 1.5, 2.0, 2.5, 3.0, 3.2, 3.5, 4.0, 4.5, 4.8, 5.0, 5.5, 6.0, 6.5mm.