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 prop