How do electric drills change the drill bit?
If that's the case, screw it with a black special wrench. If that's the way I'm talking about you.Sorry, I made a mistake. Which black circle button is not for protection, it is a self locking button. It is used to keep the running state of the electric drill. Press and hold the switch, then press the self lock button to make the electric drill keep turning. When closing, hold down the switch, then release the self locking button. This is in the instruction manual for electric drills.
In one hand and a bit black circle, the other hand to above which the reverse direction, will be able to clamp or loosen the drill bit.The black round button on the handle is protected. The one inside is adjustable speed.
