A plasma cutter is a tool used to cut through electrically conductive materials, such as steel, aluminum, and copper. It works by creating a high-temperature plasma arc that melts the metal, allowing for precise and clean cuts. Plasma cutters are commonly used in industries like manufacturing, automotive repair, and metal fabrication. These devices can vary in size and power, making them suitable for both professional and DIY projects. They are often preferred for their speed and efficiency compared to traditional cutting methods, such as torches or saws. Proper safety measures, including protective gear, are essential when using plasma cutters.