Tried to tighten 4 after 2nd and 3rd deburring, I stopped, didn't even try to tighten, we're talking 10-20 ftlbs, press down to manual stuck, rubbish, I can't trust them at all, especially when they're sticking a wheel on a car at 50 mph. Don't buy them, go to a tire shop and pay a little more for a good kit