A tin-opener.
For opening tins
I think it will be the Majestic Star Dragon and Earthbound Immortal Wiraqocha Raschqa tins.
Because it will A'splode
Tuna, salmon, sardines, and mackerel are all available in tins. But the generic name for fish sold that way is cannedfish.
What do y call a opening fence
A collective noun for tins is a case of tins.
FaithNoMore
May we call in mam tes for the opening
protractor
Oustiti
In my house there is. I call it "my arm". If you have really high ceilings, I suppose you could use a pole of some kind.
You may be thinking of a spanner, which is what the English call the tool that Americans call a wrench.Americans also have another tool called a 'spanner wrench'.