Once again, the community comes through with some really great stuff! Actual patents, razor handles, etc, for these little blades. We can rest easy when we find another use for them!
I used them to cut the window insulation film that I used on my windows this winter - the sharp blades cut better than any utility knife I have. Of course I had to be extra careful with them, but there were no 'incidents' of any kind. I would love to get a holder / handle that will allow me to use them more easily - perhaps I will make one for myself before next winter