Eye-specific stamps: Each box comes with 2 pens, 1 for each eye. Each stamp was specifically designed to best suit each individual eye, giving your wings a perfect, consistent shape with each application.
Double-sided pens: In addition to the eyeliner stamp, each pen has an eyeliner pencil on the other end. You'll always have an eyeliner pencil handy, and it's one less thing for that crowded makeup bag!