My wife had tires put on at a local tire place. I needed to take wheels off to change springs and ended up stripping the McGards on 3 of the 4 wheels using the correct "key." I don't know if they over torqued them, but I suspect they didn't. I do know that I'm fully qualified to take a tire off, so my opinion is that McGards can be a PIA. To get the wheels off, I had to drill through the end of the McGard and drill out the lug, then replace the ruined lug. Pretty much tripled the time it to to replace her coil springs. She parks in a secure lot at work, so I'm not too afraid of wheel theft, but I'd consider using them again if I had to park it outside or in a marginal neighborhood. I don't know if they are made of hardened steel or not, but they should be. The key stripped the ends out like they were made of butter, I mean even before putting much torque on them. Yes, the key was fully seated into the wheel lock.