The Triage Triangle brush is unique and has a patented design. Three flat surfaces produce a smooth line through the hair. The rounded edge provides a bend. The flat surface creates the tension that helps direct the hair without constant spinning of the brush, which adds up to less work. Eliminates frizz & creates silky smooth hair. A Ceramic barrel evenly spreads & holds heat longer, so hair dries faster. It also emits negative ions when heated, assisting in the breakdown of bacteria, reducing static & sealing the hair cuticle. 2.25 in per side.