Scary halloween phone grip for kids librarian phone grip holder for the back of your phone wallet Spooky skeletons reading books in library bookworm gifts retro vintage theme Halloween gifts for book lovers. Bookish gifts retro skeletons reading a book pop phone grip back of phone holder sticky phone grip. Adhesive backing attaches the PopGrip to your case or device. Will not stick to silicone, leather, waterproof, or highly textured cases. Works best with smooth, hard, plastic cases. Not compatible with wireless charging Printed top is swappable with other compatible PopGrip models. Just press flat, turn 90 degrees until you hear a click and remove to swap.