Makeup That Does More. Create the natural looking brows you've always dreamed of with Revolution PRO Define and Fill Brow Pencil. This ultra-fine brow pencil creates the most convincing hair-like strokes for a natural and soft looking brow. The weighted component sits comfortably in the hand in order to support precise application, letting you be in control of your own brows. Once you have filled in your brows, flip the pencil over and blend through with the soft bristle spoolie for the most natural finish.