25pc 80/80 Printed Nail File Design Nail Sanding File Polish Buffer Double-sided Repair Type Polished Bar Half Moon Manicure Tool
Material:Sandpaper on surface,Plastic in middle-level.
The curve is much better for filing around the cuticle area as that curve sweeps around and is less likely to damage the surrounding skin. The file feels good too in your hand, and I think they last longer than the straight sided files I've been using. Great product!