Dewalt qz extreme 2 metal drill bits 34 151mm dewalt dt5052 qz, this 8.0 x 117mm drill bit from dewalt has been manufactured to a very high standard courtesy of the innovative tapered web which greatly reduces breakage, while the gold ferrous oxide coating prevents overheating for longer bit life'. '.strtoupper('w')hether you are a professional tradesman or diy enthusiast, the drill bit is ideal for portable drilling of steel, alloyed and non alloyed up to 900n mmsup2, and for drilling a sheet or thin materials suitable for use in wood and plastics'. '.strtoupper('t')he metal tip starts drilling on contact for clean, accurate holes, while the bit itself has a no slip shank with 3 flats, eliminating slipping in the chuck diameters 5mm and above only'. '.strtoupper('d')ewalt dt5052 qz extreme 2 metal drill bit 8.0 x 117mm