Used by women and girls to wave or crimp their hair, for styling their hair, hairdressing. The irons are heated and then applied to the hair and wound to form curls. Pre-dates electrically heated curlers.One set of curling tongs made of iron/steel, rusted. The tongs are two shaped metal pieces which clamp together over a tress of hair. One set of crimping tongs. These have two wavy iron shaped metal pieces which clamp over a tress of hair to produce crimpy waves.hair-crimpers-curlers hairdressing heated-curlers