What it is: A waterproof eyeliner pencil that maintains a precise tip by automatically self-sharpening with every twist of the cap.What it does: The hyper-pigmented kohl delivers color-rich results. Long-wearing, waterproof and non-flaking, this pencil can be used on the waterline. Its built-in self-sharpener ensures a precise tip with every twist of the cap. How to use: To sharpen, simply twist the cap closed. If you hear a click, stop twisting. Line the waterline of your eye for major definition. Let it set to maximize wear time.Pro tips: This time-saving liner can also be used on the inner rim or as a shadow. Just build up product on your lid and blend out with a powder shadow. Don't forget to let it set.