on the odd occasion I have to use a can with a key..inevtably I can't turn it because it's so tight...so I grip it with a pair of pliers..... incredibly ridiculous to think you have to use pliers to get into a can of food...Coming from a Portuguese background, there were always cans of Sardines in the house. Hated when the tab would break and you had to use something else to open the can.
I remember using that key and how our kitchen junk drawer had about a dozen of them stashed in there. I guess my parents thought they may need a spare some day. lol