What is a "can opener"?

A can opener is a kitchen tool used for opening cans or tins. It typically consists of a handle and a cutting mechanism with a sharp blade. To use a can opener, you place the cutting wheel or blade against the edge of the can lid and then rotate the handle, which causes the blade to puncture and cut through the lid, allowing it to be removed. Can openers come in various designs, including manual handheld models and electric versions, each offering different features and benefits.