【Sizes】There are a total of 6 pieces of taps in different sizes from M3 to M10, which you can use for tapping different threads. 【Design】The taps are designed in a spiral shape and the chip cleaning process would be better. 【Drilling】These are taps with drilling function, used for drilling holes and cutting new threads at the same time. You will have the experience of smooth tapping with them.< /p> 【Precision】These taps are used on a machine for tapping. They are usually more accurate because human error is excluded. Note: The data is all manually measured, please allow an error of 1-3 cm. Due to the light and display difference, there may be color difference. Please refer to the actual item you received.