1, you need to prepare a can as well as the metal spoon needed to open the can. Hold the spoon firmly in your hand and put it on the edge of the can to press a trace;
2, when pressed to a certain extent, you will see a crack in the indentation, and then you just need to use the spoon along the crack want to use a canning knife to cut like;
3, finally, will be cut canning lid can be opened.