Call me opinionated, but my opinion is the one that I bought 40 years ago is/was the best. And it wasn’t expensive either. What I do not like are the ones that merely smash the terminal socket. This one has a little projection that deforms the socket with an indent that makes it strong and doesn’t turn loose. I guess the maker said this is only for uninsulated terminals, but I’ve been using it on insulated ones for 40 years, and it works for me. Hint: The terminals’ socket has a split along one side. Apply the tool so the little projection pokes at the side opposite the seam for a secure crimp.
