In my opinion self-adjusting wire strippers are the best for wire stripping, they can strip even the tinniest wires and are the easiest to use. I have a fairly generic one, there's no branding on it, at first when I saw it I was fairly sceptical because of it, plus it was dirt cheap compared to branded ones. I thought it can't be any good, but I was proven wrong after I bought it and tried it out afterward. 😁