Nail File Board | Square End 120/180 Grit (50 Pack)This Nail File Board Square End 120 180 Grit (50 Pack) is designed to give you a professional solution at home or salon. Maintain your nails while shaping and refining natural nails or nail extensions with the double sided squared end 120 180 grit. What you'll love Square End Double Sided 120 180 Grit How to Use Place the file under your nail at a slant, using long and smooth strokes in one direction to shape nails. Avoid filing back and forth to