Gotrays - Combination Drill and Tap Bit, 6pcs Metric Thread M3-M10 Titanium Coated hss Drill Bit and 1/4' Hex Tap Bits

These taps are made of high speed steel and their surface is finished by nitriding for high hardness and rust resistance There are total 6 pieces of taps in different sizes from M3 to M10 that you can use to tap various threads The taps are designed with spiral flutes and the chip cleaning process would be better These are taps 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 These taps are used on a machine to do the tapping, usually more accurate as human error is eliminated