[header] How to use a manual can opener [title] Identify the cutting edge. [step] Generally, the cutter mechanism of the manual can opener features a sharp tip to puncture of the can lid. You may see a curved or hooked point.
It usually sits at the apex of the two long " arms " that you use to open and close the device. It should be situated alongside the handle, the axle, and the serrated wheel that will bite into the rim of the can lid.