Already in love with Surratt Beautys Expressioniste Brow Pencil and dreading the day it finally runs out Thanks to this refill cartridge, theres no need to give up on your quest for perfectly defined brows. Simply insert the cartridge into the holder to continue enjoying the pencils refined tip, allowing for hair-by-hair precision with every use, and look to the other end to further shape the brows with the attached spoolie brush.