Dewalt qz wood auger drill bits 200380mm dewalt dt4606 qz this 12 x 200mm drill bit from dewalt has been manufactured to a very high standard courtesy of the special lewis spiral flute which allows for fast removal of debris and rapid drilling another feature is the outer cutting spur for clean holes with less splintering making it perfect for either the profressional tradesman or diy enthusiast drilling clean precise holes through beams joists doors etc dewalt dt4606 qz wood auger dr