Lifelong durability dual grade - coarse/fine nail file. Directions File from the side of the nails to the centre in even strokes. Always file in one direction, never back & forth. Use the coarse side to shape the nail & the fine side to smooth the nail edge for a flawless finish. Usage Advice Avoid excessive filing of nail corners as they provide extra strength to the nail. Square/oval shaped nails are recommended. Care Instructions After use, wipe over with a damp cloth or gently scrub with a nail brush to clean. Allow to dry naturally. Store in protective pouch.