I know that it makes no sense, but why does Scizor's hands look like Trapinch?
It swings its eye-patterned pincers up to scare its foes. This makes it look like it has three heads.
It has a steel-hard body. It intimidates foes by upraising its eye-patterned pincers.
They’re essentially just pincers marked with fake eyes for intimidation.