although I've seen jerks use wood chisels to cut screws off, so far I've never seen anyone use a micrometer for a C clamp. But, I've been at the inspectors bench when he accused guys of doing just that and springing the frame of good mic's. That's the reason for the ratchet. Those are set for the right amount of pressure. Where not everyone "feels" the same when adjusting the mic when taking a reading.