I've had this in my toolbox for 4+ years... finally pulled it out and put it to work... wow, I won't be soldering anything anymore. I cannot pull those connectors off that wire, it REALLY clamped it in. I see no reason to do any other connectors. I had picked up dies for insulated (as pictured), non-insulated, and spark plug. Just thought I'd share. Pro'sKit CP-371

Decent youtube how to video here...