A curling iron is a popular hair styling tool used to create curls or waves in hair. It consists of a heated metal barrel that comes in various sizes, allowing users to achieve different curl styles. The device is typically powered by electricity and features a handle for easy maneuvering. Users wrap sections of hair around the barrel, and the heat helps to set the curl. To ensure safety and prevent hair damage, many curling irons come with heat settings and automatic shut-off features. Additionally, some models include a clip to hold hair in place while curling. Proper use of a curling iron can enhance hairstyles for various occasions.