Estink Titanium Coated Tap and Die Set, 6PC HSS Metric M3-M10 Fluted Taps Dies Kit with 1/4" Hex Shank

HSS Titanium Coated: The tap drill bit set is made of high speed steel and finished with nitriding for high hardness and rust resistance. More Have sufficient bending strength and wear resistance. 6pcs countersink drill bit: There are a total of 6 pieces of different size drill and tap sets, from M3 to M10, which you can use to plug various wires. Thread (metric system): Shank:1/4 inch (6.35mm) hex shank. Metric : M3x0.5mm, M4x0.7mm, M5x0.8mm, M6x1mm, M8x1.25mm, M10x1.5mm. Drilling Function: These are drill bit sets with drilling function, used to drill a hole and cut new threads at the same time, you will have a smooth tapping experience with them. Improve Working Efficiency: The 6 piece metric thread tap drill bits set is designed with spiral grooves, and the chip elimination process would be better. Drill tap bits increase efficiency of by allowing for drilling and tapping to be accomplished in a single pass. Application: These HSS drill and tap bits are great tools used to create screw threads, to cut or form the female portion of the mating pair, generally more accurate because human error is eliminated. They are used on a machine to do the tapping, such as a lathe.