Snaps easily into place so you can change shades in an instant. The Automatic Lip Pencil Duo is a versatile, double-ended pencil with twist-up color on one side, a lip brush on the other. Color tip is always perfectly shaped--never needs sharpening. CUSTOMIZED, CONVENIENT You can create your own custom lip tools using the Automatic Lip Pencil Duo, thanks to the unique snap-in, snap-out cartridges. For example, if you have an Automatic Lip Pencil Duo in one shade, try a refill in a second shade. Just snap out the lip brush cartridge and snap in the second shade for an ultra-convenient and very versatile tool. Estee Lauder Automatic Pencil Lip Duo Refill - Spice