This sharpener keeps your pencils in pristine condition by creating a precise point for easy application every time. Designed to fit Buxom's Plumpline Lip Liner, the ultra-sharp blade preps your pencil so that you can define, contour and fill lips for dramatically plumped looking lips. #1 Plumping Lip Brand Source: The NPD Group/ U.S. Prestige Beauty Total Department/Specialty, Makeup Sales, Annual 2018