Ultra-Fine Precision Brow Pencil. The secret to getting runway-ready beautyà Defining your brows! A perfect brow is the finishing touch for every look, and the Diorshow Brow Styler is the one must-have tool you need to define, fill and shape. With universally flattering shades and an ultra-fine tip, it creates a naturally polished look for women of every skin tone and hair color.