For shorter styles, the 0.5" Swap Top brush head is an additional brush head that can be used with the Perfecter Pro Swap Top brush handle (not included). The Perfecter Pro Swap Top lets you easily switch brush sizes so you can volumize, curl, smooth, and straighten. Simply twist tool to the unlock position, pull out the round brush top, and swap in your preferred size. The unique bristle design features top-quality nylon bristles perfectly aligned to gently hold hair to the barrel while gliding through each strand. It helps create the look of volume, smoothness, and the appearance of shine. How do I use it: To change head, twist tool (not included) to unlock position, swap in preferred size, and lock it in. Use on dry hair only. Use styling guide to learn how to create versatile looks. From Calista.