Features:

Tungsten steel bit, easy to handle, precision grinding technology, high wear resistance, high hardness, durable.

Good chip removal, double edge milling cutter edge sharp, chip removal fast, high durability, not easy to break the cutter.

Spiral groove, sharp cutting edge and large spiral groove design can prevent the formation of chip accretion.

Humanized positioning ring sleeve box design can reduce the debugging time of the machine.

The anti-seismic design of knife edge can slow down the vibration of machining process and improve the surface quality.

Matters Needing Attention:

1. When drilling, it should be vertical, Don't push too hard, Slowly twist the needle toward one direction, the needle should not be broken by force Don't pry, otherwise it is easy to be damaged!

2. Do not clip it on the electric hand drill to drill holes at high speed, otherwise the amber will collapse.

3. Pay attention to cleaning the surrounding powder while rotating.

4. Hold the end of the drill bit by hand and rotate it slowly to drill. When it is about to open, pay attention to reduce the speed and strength.

5. If you feel that the needle is tight when rotating, Please withdraw the needle, After cleaning the hole, the powder is not re entered!

Package included: 

10pcs/Set Drill Bits

Notice:

1.Please allow 1-3mm error due to manual measurement,Please make sure you do not mind before you bid.

2.The colors may be a little difference for the different monitors displays, please understand.