self-tapping screws are generally used.

if you want to fix the aluminum alloy, you should generally use self-tapping screws instead of ordinary screws, and when fixing, you should use an electric drill.

The front end of self-tapping screws is generally pointed and can be tapped by itself. If self-tapping screws are used in aluminum alloy materials, it is unnecessary to drill bottom holes and tap. It's up to us.