A manual can opener is a handheld tool designed to open metal cans. It typically consists of a rotating cutting wheel and a handle. To use it, the user clamps the opener onto the can's rim and turns the handle, which drives the cutting wheel around the lid, creating an opening. These can openers are often made of stainless steel or other durable materials, ensuring longevity and resistance to rust. They are a popular choice for those who prefer a simple, mechanical device over electric can openers, making them easy to use in various settings, including kitchens and camping trips.