The b. Dual wand mascara has everything you need for instant definition, for every single one of your lashes. The wider brush lifts and adds volume to your upper lashes, while the smaller, slender brush is perfect for capturing those elusive lower lashes. Both brushes ensure each lash is coated in the easy to apply, buildable formula. The small brush is also ideal for getting to those hard to reach corner lashes, meaning no lash is left untouched.