Sapphire Nail File Features: Coated in synthetic sapphire particles which make the file smoother and increase its durability. Helps in shaping, smoothening, and finishing nails. High-quality stainless steel. Double-sided. Long-lasting. Directions: File your nail from the side to the centre in one direction. Grooming Tips: Dry your nails and clean them before using the fibreglass nail file to prevent any breakage or damage.