Yes they seem OK to me
Yes got one had it when I was working, never let me down
Waste of space what you need is a good strong folder, these Klein knives are to sharp, to thin, you need something that will part the conductors, and what is extensively a Stanley knife are a waste of time for stripping T&E
here's mine. also handy for punching plumbers and /or project managers in the gob. :
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just have to be careful to remove fingers from the guard before closing blade.