I have the exact same wire strippers only in a different brand, they are invaluable as you say
I'm pretty fortunate in having a reasonably well stocked tool shed ( a carpenter by trade but not done it as a paying job for a good few years now ) one of my other long time hobbies has been building and modelling 1/16 scale military rc vehicles so I have acquired an array of tools over the years that should come in handy such as a soldering setup wire crimper multimeter etc plus a lot of other modelling tools so luckily I won't have to fork out on these which means more money for locos and the like
Cheers, Lee.