The metal comb makes it easy to apply to the short hairs at the inner corner of the eye and to the lower lashes. I bought 03 Sweet Black! It's a sheer, slightly sophisticated color. I have thick, voluminous lashes, and most mascaras tend to make them look frizzy and dirty. But the fiber-free metal comb and the slightly soft color give my lashes a delicate finish, which I love! It's quickly becoming a staple in my makeup arsenal! I love it!