Professional Nail File For Gel Nails, Acrylic Nails, Poly Nails And Natural Nails. Ideal For People Who Like To Do Nail Art! Different Grit Size Function: ??60 Grit - Sharpest And Roughest. Very Suitable For Acrylic Nails, Gel Nails, Dip Nails, Pet Grooming And Hard & Thick Toe Nails. ??80 Grit - Sharp And Rough. Very Suitable For Gel Nails, Acrylic Nails, Poly Extension Nails And Powder Nails. ??100 Grit - Sharp And Coarse. Very Suitable For Gel Nails, Acrylic Nails, And Hard, Tough Toenails. ??150 Grit - Sharp And Coarse. Very Suitable For Gel Nails, Acrylic Nails, And Hard, Tough Toenails. ??180 Grit - Medium Sharp And Coarse. Very Suitable For Fingernails And Toenails. ??240 Grit - Soft And Gentle On The Nail Surface. Very Suitable For The Final Filing Of Natural Nails. Tips For Choosing Nail File: ?? The Lower The Grit, The Sharper And Rougher The Nail File, Suitable For Artificial Nails. ?? The Higher The Grit, The Less Sharp And Coarse The Nail Filer, Suitable For Natural Nails. ?? Please Select The Right Grit Size Nail Files According You Need.