$21, available in 10 colors here:
Amazon,
Sephora,
Nordstrom,
Ulta,
Macy's
The Brow Wiz has a thin, retractable pencil on one side, allowing you to outline and define your brows with precision, and a spoolie on the other to blend out your work and make it look more natural. If your brows have gaps or sparse areas, it's easy to add hair-like strokes, and because of the pencil's pigmentation, you don't have to use excessive pressure as you do so.