The mini one's scissors are well under the 4 inch blade length allowed.
Box cutters have a 1 inch blade and they're not allowed. It's probably safest to leave that in the suitcase especially if it has any sentimental value.
Of course I did toss it in the clear plastic bag containing the kit, in my purse, rather than keeping it in my pocket or on my keychain. That might be why I was allowed to keep it with me.
(I'm betting "they" just missed it, but...) This reminds me of an interesting experience I had first hand. During a service call at the local court house, I had to take my laptop/tool bag through security (oh joy). Now historically having no luck with these things, I'd already strip-searched myself in the parking lot to be sure I wasn't carrying anything eyebrow raising...
I empty my pockets in the tray, included in the pile are keys, wallet, pen, & a Leatherman pocket tool. As would be expected the "guard" had issues with the tool because of its 2 inch blade - screw the laptop case burgeoning with much larger and potentially more dangerous metal objects (tools...) ... One-track here just found his-self a genuine bladed "weapon".
So I explain (to Rosco P. Coltrane
) that the tool is part of the job that I am here to perform. ...Which results in a 10min step out of line to initiate a thought process... - Stoicism really pays off here because the last thing you want at this point is any of what you're really thinking to cross your facial expression or this is going to be a really long-er day...
Finally a "decision" is made. He places the Leatherman in my tool-bag
reasons" and sends me on my way. ...And what exactly did this actually accomplish? Nothing.
Point being, these days it's better to be (bored) safe than strip-searched by a team of bored "professionals" doing a thankless job on a power trip.