Wera 847 Hex Shank Tapping Drill Bit

The Wera 847 HSS Combined Tapping Drill Bit in 8.5mm is the largest in the range, designed to produce M10 threads in a single, efficient operation. Ideal for heavy-duty fabrication, structural steelwork and industrial assembly, this size handles the tougher demands of larger thread cutting with ease. Constructed from high speed steel (HSS), the bit's finely-tuned material elasticity ensures it retains its integrity under the greater forces involved in cutting M10 threads. Excellent centring properties keep the bit aligned from the outset, and the efficient chip evacuation d