― This is a simple tool, but a very important one, on the vanity. It is the pencil sharpener... ∙ Seems simple enough, doesn't it? They are quite affordable and if you use eyeliner and/or lip liner pencils, this is something you have to have. ∙ Here are a couple of reasons why you need one, and you may not have thought about these. One is that the color/liner is made out of a waxy substance. There has to be enough binder in it to keep it held together but not so much that it dries [...].