What 'precision' actually means
Most drugstore tweezers are stamped from sheet steel and shipped without any tip-finishing. The tips look sharp from a distance but the jaws don't meet flush — and that's the gap (literally) that lets hairs slip through.
A precision tweezer is hand-aligned after forming, so when you press the arms together, the edges touch each other across the full contact surface. That's why a precision tool grips the first time and a cheap one doesn't.



