What It Is:A refillable double-ended holder and spoolie brush for our Eyebrow Pencil, designed for comfort and ease of application.What It Does:- Pairs with our Eyebrow Pencil to define and shape brows. Refills with cartridge-available separately.- One side holds the pencil cartridge, while the other contains a built-in spoolie brush to comb through product and tame brows.How To Use It:- Take Eyebrow Pencil Cartridge to insert into holder. - Position the cartridge into the holder and push firmly