Cobalt Drill Bits from Dewalt: Another variation on the metal drilling has arrived, Cobalt drill-bits are the next step up the hardness scale from HSS and Extreme drill-bits. They are designed to drill very hard materials, and will cope better with metals like stainless steel. Simply the best bit you can buy if HSS and HSS Extreme titanium is just not good enough. Available in single packs or sets.
