How to change the drill bit of an electric drill - self tightening type

Self tightening electric drills generally use threaded methods to fix the drill bit, and the front section of the drill bit is made of plastic with anti slip patterns. Hold the plastic bolt with anti slip pattern at the front end with your hand, preferably wear thick gloves, then slow down the rotation speed, press the switch, you can open the "three jaw" of the drill bit at the front end of the drill bit, and the drill bit can be removed, then put the new drill bit in, and then reverse the operation.