A hair iron or hair tong is something people use to change the shape of the hair by heating it. There are three types of hair iron:
- Straightening irons (sometimes called hair irons, hair straighteners or just straighteners), which straighten the hair.
- Curling tongs (sometimes called hair tongs or hair curlers or just curlers, or less often curling irons), which make hair curly.
- Styling irons (sometimes called hair stylers or just stylers), that can straighten and curl the hair.