Metalworking & Multipurpose Drill Bits / Gun Drill BitsM35 Cobalt Drill Bit Set,1.0-3MM, for Drilling on Hardened Steel, Cast Iron and Stainless SteelPackage Includes : 10PC X 1.0MM10PC X 1.5MM10PC X 2.0MM10PC X 2.5MM10PC X 3.0MM