thanks to the self-adhesive layer, you don't need glue to apply them, as they adhere perfectly they last a long time on the nails. essere Reused, they adhere perfectly to natural nails, they are flexible and do not damage natural nails Modo Directions for use: Press the false nail firmly onto the nail naturale – starting in the center and then moving to the sides. Hold each nail for at least 30 seconds. Push back the cuticle or carefully remove it with scissors or tweezers.