Use the Definer end of the Dual-Ended Brow Definer/Groomer Brush to pick up product. Start at the inner corner of the brow and use short, even strokes to fill in the entire length of the brow’s natural arch. As the brow tapers, use the narrow edge of the brush for more precise application. Then, use the Groomer end to shape brows and soften color, brushing brow hairs up and over.