How to screw the triangular groove?

First of all, it is difficult to buy the corresponding tools in the market. Even if there is, many people are reluctant to buy it because it is not commonly used. Replacing small appliances with new ones is one of the conspiracies of manufacturers.

Secondly, if the screwdriver can't be disassembled, the contents can be shoddy.

There used to be a plug-in board called Lion Bull Electric, which used this kind of screwdriver. When it is broken, it can't be removed, so we have to throw it away.

Just remembering this brand is to remind myself that I will never buy this brand of electrical appliances again.

I suggest you pay attention when buying small appliances, and never buy this screwdriver, otherwise you will be really angry when disassembling it.