Wera 847 Hex Shank Tapping Drill Bit

The Wera 847 HSS Combined Tapping Drill Bit in 3.3mm combines drilling, tapping and deburring into a single operation, cutting an M4 thread with precision. This size is well-suited to general metalworking, light fabrication and engineering applications where M4 fixings are commonly used. Constructed from high speed steel (HSS), the bit delivers excellent durability thanks to its finely-tuned material elasticity. The superb centring properties ensure the bit seats accurately on first contact, whilst perfect chip removal keeps the work area clean and reduces the risk of jammi