The MAC Pro Brow Definer is engineered for precise application, featuring an ultra-fine 1mm tip that allows for detailed definition and shaping of the eyebrows. This pencil delivers rich, buildable color that mimics natural hair strokes, ensuring a perfectly sculpted and polished look. Its formulation is designed for smooth glide and long-lasting wear throughout the day. Ideal for filling in sparse areas, creating sharp tails, and defining the brow arch with professional accuracy.