BROW XENNA EYEBROW RULERThe easy hack that give YOU perfect brow symmetry EVERY time! The NEW Brow Xenna ruler is designed for precise alignment of the brow shape, helping you decide where to start, where to end and where to create that perfect arch! This ruler helps to ensure perfect symmetry and avoid common shaping mistakes. Unlike conventional rulers, this ruler has a flexible design, which makes it very easy to use and bend around the brow bone of your client. Perfect