What it is: Brow Definer is a versatile brow pencil for defining, shaping and filling eyebrows. What it does: The soft formula glides on easily yet provides full coverage with a matte finish for the most accurate brow primping and long-lasting wear. The Brow Definer is accessorized with a spoolie brush to comb brows and a sharpener to ensure precision. Engineered with a slender body in a custom length, it provides skilful application. It is coated in a luxurious matte black and topped with a studded gold cap. Style Name: Christian Louboutin Brow Definer. Style Number: 5346826. Available in stores.