EXTREME 2 Metal tip starts drilling on contact eliminating walking for clean, accurate holes (diameters 4.8mm and above only). Innovative tapered web greatly reduces breakage. No-Slip shank with 3 flats eliminates slipping in the chuck (diameters 5.0mm and above only). Permanent size markings located above the shank for increased visibility. The NEW EXTREME 2 Metal drill bit designed to maximise drill performance offers: Faster drilling - up to 4x faster than standard HSS-R drill bits. Increased durability - up to 50% stronger than standard HSS-R drill bits. Cleaner, more accurate, burr-free holes due to recessed cutting wings. Gold Ferrous Oxide coating prevents overheating for longer bit life.