system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come we don't use triangular head screwdrivers? Isn't it a stronger shape than a cross or square?
gpt
No. Triangles are strong in the sense that a hollow triangle will convert any force on its corner into compression and tension in the sides. It is not especially strong under shear, as is needed in a screwdriver.