This brush is an essential for ALL make up bags! Not a day goes by that I apply make up without this brush.. It's easy to use and the width of the brussels will help you perfect a cat eye or straight line in a jiffy! I use this brush to fill in my brows with black eye shadow, use it for eye lining with gel liner and black eye shadow.. Don't forget to clean your brushes regularly, rinse - shampoo/soap - rinse again and all done :)