20 Pack 100/180 Grit Nail Files, Black Professional Reusable Emery Boards Manicure Tool for Acrylic Nails, Nail Buffering Files

File and rough up your hard finger nail and toe nail with 100 grit Use 180 grit smooth up nail edge with refined shape Grind surface of nails with 180 grit side nail file Then start your DIY nails