What it is: An ultra-fine brow shaping and defining pencil that draws incredibly natural hair-like strokes that last up to 12 hours.What it does: Transform shapeless, undefined brows with just a few strokes of Precisely, My Brow Pencil. The custom ultra-fine tip makes adding detailed definition to your brows easy, by drawing incredibly natural-looking, hair-like strokes that last up to 12 hours. This rich, waterproof pencil is ideal for spot filling sparse or over-tweezed areas and the smudge-proof formula is firm enough for precise application yet glides on effortlessly to bring symmetry to your brows and your entire face.Beauty tip:To lock in the brow pencil’s soft color for up to 24, budge-proof hours, apply the 24-HR Brow Setter Clear Brow Gel (sold separately) on top.