Good brows frame your face and can make the application of eyeshadow a breeze. A brush helps keep your brows well groomed. There are two basic types of eyebrow brush: One is rectangular with short, stiff bristles; it looks a bit like a small toothbrush (in a pinch you can use a baby toothbrush). This brush is best used for general grooming and after the application of brow pencil to blend your brows with the pencil lines. The other brush is stiff and angled. This one is used with powders that are brushed onto brows to enhance them. The unique shape of this brush allows you to apply the powder very precisely.