Two in One! Highlighter & Concealer. Billion Dollar Brows’ Brow Duo Pencil has been dubbed their “ Magic Marker” because of the way it illuminates & creates a truly eye catching set of beautiful brows. Get picture perfect brows with the secret weapon of Billion Dollar Brows Salon. Billion Dollar Brows Brow Duo Highlighter means that you can highlight your brow bone to add gorgeous definition & warmth. Works with any skin tone. Plus, for those on-the-go touchups, Billion Dollar Brows have also added a handy universal concealer to the opposite end of the pencil.