Why were flat and torx screws invented?

Flat screws are generally used for wooden utensils, while torx screws are generally used for metal.

At first, people used flat-head screws, and later converted to cross-head screws to save labor. However, people did not give up the traditional flat-head screws immediately, so there are currently two types of screws on the market.

Because they have sharp points and a large thread angle, torx screws can be screwed in easily and have high work efficiency, so they are mostly used for metal utensils, while flat screws require a certain amount of force to screw in. The force can be adjusted according to different utensils, so they are mostly used for wooden utensils.

and other fragile appliances.