25 count of 180240 grit professional nail files for acrylic nails and natural nails Must have in professional nail salons and DIY nail art at home Medium Grit 180 Gentle shaping of gel acrylic nails of medium thickness and for shaping the free edge of nails Fine Grit 240 Finishing on gelacrylic extensions and filing and shaping natural nails Easy to clean and water resistant as the nail files are made of high quality adhesive tape and emery board materials Great nail files kit for filing nails before nail treatment and nail extension