Originally Posted by kaj

One style key had 19mm hex head on it. It was chrome plated amd looked relatively cheap. I think it's the one that came with the nuts. The tire shop split that one. Probably due to impact + torque sticks. I've cracked one of those, myself. I then found the same style but in a black, hardened (?) steel, made by Gorilla. It kinda looks like the same material impact sockets are made from. Anyway, that one distorted, but no cracks yet. I then found another Gorilla key that has a 1/2" drive on it, so it goes right on the torque wrench. I love that one because I don't have to carry around an extra socket. That one also deformed a bit, no cracks.
I don't want to risk it, so I broke them loose with breaker bars and torqued by hand. Just my experience. Others may vary. I do love Muteki, though. I've been using them since 2002. No complaints.
I finally was able to ditch the whole setup for a standard lug nut and now I use a regular socket and impact gun. Plus the new nuts are shiny and gold.

Originally Posted by razorlab

No, I'm talking about making sure you put the key IN a deep impact socket mounted on the impact. I use the chrome keys as well. If you support it properly I haven't had issues. Where I did see issues was putting it in a shallow impact socket, then it can wobble all over the place and do bad things.

Originally Posted by Driv200

Good input. I just replaced all 4 corners with ARP extended. Seemed appropriate with new hubs and axles at all 4 corners at same time.