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At least the cat will survive.
That part got me, especially with my avatar cat.
I don't think it is sanding down the metal enough that it is at that point where filings would be everywhere. If you were worried about that, you could wipe the can off before turning it upright and trying to open it.
Someone invented and marketed a can lid unroller which I saw when I was at school 40 years ago. Another kid from Germany had one. They are so much better than the ones which cut through the top or side and they still have not got into mainstream use. They just unroll the top of the can and you lift it off. They dont have a blade on them but one cog-wheel thing where normally you would find the circular blade. I found them in a shop a couple of years ago and bought 2 of them. Really cool things, obviously I just dont like the sharp can tops very much. I will post a pic soon in case anyone is interested.
reply to post by SPYvsSPY
I have been carrying a P-38 on my keys for over 30yrs, the old one I have can also be used as a screwdriver in a pinch.
more P-38 info