Hex Tap M4 HSS Drill Tap Bit 1/4" Hex Shank Drill Bits Screw Thread Metric Tap Drill

【Designed with Spiral Flutes】The taps with drilling function, used to drill a hole and cut new threads at the same time, will allow you to get a soft tapping experience of metal, aluminum plate, iron, etc. 【High Hardness & Rust Resistance】:This m4 hex head tap drill bit is made of high speed steel and features a surface nitriding finish for high hardness and rust resistance. 【More Accurate and Efficient】Automatic centering point, does not require auxiliary center drilling and center perforation, more accurate, eliminate human error, greatly reduce processing steps and time costs, improve work efficiency. 【Anti-wear】The back of the cone is covered by the tap to avoid excessive puncture caused by damaged nets. 【6 different sizes from M4 to M8】: Quick change 1/4" hex shank with imperial sizes engraved on the taps to meet your various requirements.