【Salon Level】 The nail files set is sturdy and durable, made of high quality Emery and not easy to break or bend. The grit won't fall off no matter how many times you use, helps you shape your nails without damaging them. , 【Double-sided roughness 100/180】File and rough up the hard fingernails and toe nails in 100 grit, and use 180 grit smooths up your nail edge with refined shape. Easy for Beginner.