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