Why not simply use a clamp-type connector?
I couldn't agree more, but perhaps, these are made for new work, as in installing it in a new line of pipe?
Most of the crimp gear I use gives a standard crimp every time.
When Mr Plumber comes along with his slip-joint pliers and attempts to do a decent crimp with them, I can't see how an effective connection can be made, especially one that could quite conceivably carry quite a bit of current under fault conditions.
One last question, is there a proper crimp tool offered for these devices?,some of the crimps on that page that Paul linked to, look really shocking.
Let's face it, these days if you're not young, you're old - Red Green