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Wow! good to know that there are knives like that, imagine can still pass through scanners? You really have a different kinds of knives that you can bring everywhere. Thank you so much @galenkp for your help and support too.

It's a useful tool indeed, but won't get through security scanners; not that I've tried, I'm not that foolish, but I know it won't and so when I fly it goes into my checked luggage to emerge and go back into my boot on arrival to my destination.