Well I have been helping a guy rewire a car with stuff we found on ebay and much of it was in bad shape,would have been much easier to fix with new connectors instead of trying to pry open the crimps,solder new wire to old and recrimp the outer most crimp,basically after that I just want to buy a box of these things and have them on hand for later when I start going through my own wiring.

I will get some bought this week and try to find the crimp tool also,thx guys.