【Double-sided Grit】Double-Sided Emery Boards: 100/180 Grit Double Sided Gel Files:100 Grit are rough gravel side,Fast/Easy to remove nail gel,Suitable for toe nail or gel/acrylic nails,Hard natural fingernails.180 is medium grit,idea for shaping edge of natural nails. , 【Premium Quality】 Nail file kit is made with top quality adhesive tape and emery board materials, Designed with round top & Double Sides, Sandpaper on surface , Sturdy & durable, can last for a long time