How does the ground wire attach to these clips? Do you crimp it on somehow?

Also, do you trust these? Wouldn't it be better to just use the pre-made grounding pigtails with a lug for a screw to the box? Or are there some cases where you don't have a choice but to use this:

[Linked Image from ts.smoothcorp.com]

[This message has been edited by SvenNYC (edited 04-07-2004).]